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Organizing Your Social Sciences Research Paper

• 5. The Literature Review
• Purpose of Guide
• Design Flaws to Avoid
• Independent and Dependent Variables
• Glossary of Research Terms
• Reading Research Effectively
• Narrowing a Topic Idea
• Broadening a Topic Idea
• Extending the Timeliness of a Topic Idea
• Academic Writing Style
• Applying Critical Thinking
• Choosing a Title
• Making an Outline
• Paragraph Development
• Research Process Video Series
• Executive Summary
• The C.A.R.S. Model
• Background Information
• The Research Problem/Question
• Theoretical Framework
• Citation Tracking
• Content Alert Services
• Evaluating Sources
• Primary Sources
• Secondary Sources
• Tiertiary Sources
• Scholarly vs. Popular Publications
• Qualitative Methods
• Quantitative Methods
• Insiderness
• Using Non-Textual Elements
• Limitations of the Study
• Common Grammar Mistakes
• Writing Concisely
• Avoiding Plagiarism
• Footnotes or Endnotes?
• Further Readings
• Generative AI and Writing
• USC Libraries Tutorials and Other Guides
• Bibliography

A literature review surveys prior research published in books, scholarly articles, and any other sources relevant to a particular issue, area of research, or theory, and by so doing, provides a description, summary, and critical evaluation of these works in relation to the research problem being investigated. Literature reviews are designed to provide an overview of sources you have used in researching a particular topic and to demonstrate to your readers how your research fits within existing scholarship about the topic.

Fink, Arlene. Conducting Research Literature Reviews: From the Internet to Paper . Fourth edition. Thousand Oaks, CA: SAGE, 2014.

Importance of a Good Literature Review

A literature review may consist of simply a summary of key sources, but in the social sciences, a literature review usually has an organizational pattern and combines both summary and synthesis, often within specific conceptual categories . A summary is a recap of the important information of the source, but a synthesis is a re-organization, or a reshuffling, of that information in a way that informs how you are planning to investigate a research problem. The analytical features of a literature review might:

• Give a new interpretation of old material or combine new with old interpretations,
• Trace the intellectual progression of the field, including major debates,
• Depending on the situation, evaluate the sources and advise the reader on the most pertinent or relevant research, or
• Usually in the conclusion of a literature review, identify where gaps exist in how a problem has been researched to date.

Given this, the purpose of a literature review is to:

• Place each work in the context of its contribution to understanding the research problem being studied.
• Describe the relationship of each work to the others under consideration.
• Identify new ways to interpret prior research.
• Reveal any gaps that exist in the literature.
• Resolve conflicts amongst seemingly contradictory previous studies.
• Identify areas of prior scholarship to prevent duplication of effort.
• Point the way in fulfilling a need for additional research.
• Locate your own research within the context of existing literature [very important].

Fink, Arlene. Conducting Research Literature Reviews: From the Internet to Paper. 2nd ed. Thousand Oaks, CA: Sage, 2005; Hart, Chris. Doing a Literature Review: Releasing the Social Science Research Imagination . Thousand Oaks, CA: Sage Publications, 1998; Jesson, Jill. Doing Your Literature Review: Traditional and Systematic Techniques . Los Angeles, CA: SAGE, 2011; Knopf, Jeffrey W. "Doing a Literature Review." PS: Political Science and Politics 39 (January 2006): 127-132; Ridley, Diana. The Literature Review: A Step-by-Step Guide for Students . 2nd ed. Los Angeles, CA: SAGE, 2012.

Types of Literature Reviews

It is important to think of knowledge in a given field as consisting of three layers. First, there are the primary studies that researchers conduct and publish. Second are the reviews of those studies that summarize and offer new interpretations built from and often extending beyond the primary studies. Third, there are the perceptions, conclusions, opinion, and interpretations that are shared informally among scholars that become part of the body of epistemological traditions within the field.

In composing a literature review, it is important to note that it is often this third layer of knowledge that is cited as "true" even though it often has only a loose relationship to the primary studies and secondary literature reviews. Given this, while literature reviews are designed to provide an overview and synthesis of pertinent sources you have explored, there are a number of approaches you could adopt depending upon the type of analysis underpinning your study.

Argumentative Review This form examines literature selectively in order to support or refute an argument, deeply embedded assumption, or philosophical problem already established in the literature. The purpose is to develop a body of literature that establishes a contrarian viewpoint. Given the value-laden nature of some social science research [e.g., educational reform; immigration control], argumentative approaches to analyzing the literature can be a legitimate and important form of discourse. However, note that they can also introduce problems of bias when they are used to make summary claims of the sort found in systematic reviews [see below].

Integrative Review Considered a form of research that reviews, critiques, and synthesizes representative literature on a topic in an integrated way such that new frameworks and perspectives on the topic are generated. The body of literature includes all studies that address related or identical hypotheses or research problems. A well-done integrative review meets the same standards as primary research in regard to clarity, rigor, and replication. This is the most common form of review in the social sciences.

Historical Review Few things rest in isolation from historical precedent. Historical literature reviews focus on examining research throughout a period of time, often starting with the first time an issue, concept, theory, phenomena emerged in the literature, then tracing its evolution within the scholarship of a discipline. The purpose is to place research in a historical context to show familiarity with state-of-the-art developments and to identify the likely directions for future research.

Methodological Review A review does not always focus on what someone said [findings], but how they came about saying what they say [method of analysis]. Reviewing methods of analysis provides a framework of understanding at different levels [i.e. those of theory, substantive fields, research approaches, and data collection and analysis techniques], how researchers draw upon a wide variety of knowledge ranging from the conceptual level to practical documents for use in fieldwork in the areas of ontological and epistemological consideration, quantitative and qualitative integration, sampling, interviewing, data collection, and data analysis. This approach helps highlight ethical issues which you should be aware of and consider as you go through your own study.

Systematic Review This form consists of an overview of existing evidence pertinent to a clearly formulated research question, which uses pre-specified and standardized methods to identify and critically appraise relevant research, and to collect, report, and analyze data from the studies that are included in the review. The goal is to deliberately document, critically evaluate, and summarize scientifically all of the research about a clearly defined research problem . Typically it focuses on a very specific empirical question, often posed in a cause-and-effect form, such as "To what extent does A contribute to B?" This type of literature review is primarily applied to examining prior research studies in clinical medicine and allied health fields, but it is increasingly being used in the social sciences.

Theoretical Review The purpose of this form is to examine the corpus of theory that has accumulated in regard to an issue, concept, theory, phenomena. The theoretical literature review helps to establish what theories already exist, the relationships between them, to what degree the existing theories have been investigated, and to develop new hypotheses to be tested. Often this form is used to help establish a lack of appropriate theories or reveal that current theories are inadequate for explaining new or emerging research problems. The unit of analysis can focus on a theoretical concept or a whole theory or framework.

NOTE: Most often the literature review will incorporate some combination of types. For example, a review that examines literature supporting or refuting an argument, assumption, or philosophical problem related to the research problem will also need to include writing supported by sources that establish the history of these arguments in the literature.

Baumeister, Roy F. and Mark R. Leary. "Writing Narrative Literature Reviews."  Review of General Psychology 1 (September 1997): 311-320; Mark R. Fink, Arlene. Conducting Research Literature Reviews: From the Internet to Paper . 2nd ed. Thousand Oaks, CA: Sage, 2005; Hart, Chris. Doing a Literature Review: Releasing the Social Science Research Imagination . Thousand Oaks, CA: Sage Publications, 1998; Kennedy, Mary M. "Defining a Literature." Educational Researcher 36 (April 2007): 139-147; Petticrew, Mark and Helen Roberts. Systematic Reviews in the Social Sciences: A Practical Guide . Malden, MA: Blackwell Publishers, 2006; Torracro, Richard. "Writing Integrative Literature Reviews: Guidelines and Examples." Human Resource Development Review 4 (September 2005): 356-367; Rocco, Tonette S. and Maria S. Plakhotnik. "Literature Reviews, Conceptual Frameworks, and Theoretical Frameworks: Terms, Functions, and Distinctions." Human Ressource Development Review 8 (March 2008): 120-130; Sutton, Anthea. Systematic Approaches to a Successful Literature Review . Los Angeles, CA: Sage Publications, 2016.

Structure and Writing Style

I.  Thinking About Your Literature Review

The structure of a literature review should include the following in support of understanding the research problem :

• An overview of the subject, issue, or theory under consideration, along with the objectives of the literature review,
• Division of works under review into themes or categories [e.g. works that support a particular position, those against, and those offering alternative approaches entirely],
• An explanation of how each work is similar to and how it varies from the others,
• Conclusions as to which pieces are best considered in their argument, are most convincing of their opinions, and make the greatest contribution to the understanding and development of their area of research.

The critical evaluation of each work should consider :

• Provenance -- what are the author's credentials? Are the author's arguments supported by evidence [e.g. primary historical material, case studies, narratives, statistics, recent scientific findings]?
• Methodology -- were the techniques used to identify, gather, and analyze the data appropriate to addressing the research problem? Was the sample size appropriate? Were the results effectively interpreted and reported?
• Objectivity -- is the author's perspective even-handed or prejudicial? Is contrary data considered or is certain pertinent information ignored to prove the author's point?
• Persuasiveness -- which of the author's theses are most convincing or least convincing?
• Validity -- are the author's arguments and conclusions convincing? Does the work ultimately contribute in any significant way to an understanding of the subject?

II.  Development of the Literature Review

Four Basic Stages of Writing 1.  Problem formulation -- which topic or field is being examined and what are its component issues? 2.  Literature search -- finding materials relevant to the subject being explored. 3.  Data evaluation -- determining which literature makes a significant contribution to the understanding of the topic. 4.  Analysis and interpretation -- discussing the findings and conclusions of pertinent literature.

Consider the following issues before writing the literature review: Clarify If your assignment is not specific about what form your literature review should take, seek clarification from your professor by asking these questions: 1.  Roughly how many sources would be appropriate to include? 2.  What types of sources should I review (books, journal articles, websites; scholarly versus popular sources)? 3.  Should I summarize, synthesize, or critique sources by discussing a common theme or issue? 4.  Should I evaluate the sources in any way beyond evaluating how they relate to understanding the research problem? 5.  Should I provide subheadings and other background information, such as definitions and/or a history? Find Models Use the exercise of reviewing the literature to examine how authors in your discipline or area of interest have composed their literature review sections. Read them to get a sense of the types of themes you might want to look for in your own research or to identify ways to organize your final review. The bibliography or reference section of sources you've already read, such as required readings in the course syllabus, are also excellent entry points into your own research. Narrow the Topic The narrower your topic, the easier it will be to limit the number of sources you need to read in order to obtain a good survey of relevant resources. Your professor will probably not expect you to read everything that's available about the topic, but you'll make the act of reviewing easier if you first limit scope of the research problem. A good strategy is to begin by searching the USC Libraries Catalog for recent books about the topic and review the table of contents for chapters that focuses on specific issues. You can also review the indexes of books to find references to specific issues that can serve as the focus of your research. For example, a book surveying the history of the Israeli-Palestinian conflict may include a chapter on the role Egypt has played in mediating the conflict, or look in the index for the pages where Egypt is mentioned in the text. Consider Whether Your Sources are Current Some disciplines require that you use information that is as current as possible. This is particularly true in disciplines in medicine and the sciences where research conducted becomes obsolete very quickly as new discoveries are made. However, when writing a review in the social sciences, a survey of the history of the literature may be required. In other words, a complete understanding the research problem requires you to deliberately examine how knowledge and perspectives have changed over time. Sort through other current bibliographies or literature reviews in the field to get a sense of what your discipline expects. You can also use this method to explore what is considered by scholars to be a "hot topic" and what is not.

III.  Ways to Organize Your Literature Review

Chronology of Events If your review follows the chronological method, you could write about the materials according to when they were published. This approach should only be followed if a clear path of research building on previous research can be identified and that these trends follow a clear chronological order of development. For example, a literature review that focuses on continuing research about the emergence of German economic power after the fall of the Soviet Union. By Publication Order your sources by publication chronology, then, only if the order demonstrates a more important trend. For instance, you could order a review of literature on environmental studies of brown fields if the progression revealed, for example, a change in the soil collection practices of the researchers who wrote and/or conducted the studies. Thematic [“conceptual categories”] A thematic literature review is the most common approach to summarizing prior research in the social and behavioral sciences. Thematic reviews are organized around a topic or issue, rather than the progression of time, although the progression of time may still be incorporated into a thematic review. For example, a review of the Internet’s impact on American presidential politics could focus on the development of online political satire. While the study focuses on one topic, the Internet’s impact on American presidential politics, it would still be organized chronologically reflecting technological developments in media. The difference in this example between a "chronological" and a "thematic" approach is what is emphasized the most: themes related to the role of the Internet in presidential politics. Note that more authentic thematic reviews tend to break away from chronological order. A review organized in this manner would shift between time periods within each section according to the point being made. Methodological A methodological approach focuses on the methods utilized by the researcher. For the Internet in American presidential politics project, one methodological approach would be to look at cultural differences between the portrayal of American presidents on American, British, and French websites. Or the review might focus on the fundraising impact of the Internet on a particular political party. A methodological scope will influence either the types of documents in the review or the way in which these documents are discussed.

Other Sections of Your Literature Review Once you've decided on the organizational method for your literature review, the sections you need to include in the paper should be easy to figure out because they arise from your organizational strategy. In other words, a chronological review would have subsections for each vital time period; a thematic review would have subtopics based upon factors that relate to the theme or issue. However, sometimes you may need to add additional sections that are necessary for your study, but do not fit in the organizational strategy of the body. What other sections you include in the body is up to you. However, only include what is necessary for the reader to locate your study within the larger scholarship about the research problem.

Here are examples of other sections, usually in the form of a single paragraph, you may need to include depending on the type of review you write:

• Current Situation : Information necessary to understand the current topic or focus of the literature review.
• Sources Used : Describes the methods and resources [e.g., databases] you used to identify the literature you reviewed.
• History : The chronological progression of the field, the research literature, or an idea that is necessary to understand the literature review, if the body of the literature review is not already a chronology.
• Selection Methods : Criteria you used to select (and perhaps exclude) sources in your literature review. For instance, you might explain that your review includes only peer-reviewed [i.e., scholarly] sources.
• Standards : Description of the way in which you present your information.
• Questions for Further Research : What questions about the field has the review sparked? How will you further your research as a result of the review?

IV.  Writing Your Literature Review

Once you've settled on how to organize your literature review, you're ready to write each section. When writing your review, keep in mind these issues.

Use Evidence A literature review section is, in this sense, just like any other academic research paper. Your interpretation of the available sources must be backed up with evidence [citations] that demonstrates that what you are saying is valid. Be Selective Select only the most important points in each source to highlight in the review. The type of information you choose to mention should relate directly to the research problem, whether it is thematic, methodological, or chronological. Related items that provide additional information, but that are not key to understanding the research problem, can be included in a list of further readings . Use Quotes Sparingly Some short quotes are appropriate if you want to emphasize a point, or if what an author stated cannot be easily paraphrased. Sometimes you may need to quote certain terminology that was coined by the author, is not common knowledge, or taken directly from the study. Do not use extensive quotes as a substitute for using your own words in reviewing the literature. Summarize and Synthesize Remember to summarize and synthesize your sources within each thematic paragraph as well as throughout the review. Recapitulate important features of a research study, but then synthesize it by rephrasing the study's significance and relating it to your own work and the work of others. Keep Your Own Voice While the literature review presents others' ideas, your voice [the writer's] should remain front and center. For example, weave references to other sources into what you are writing but maintain your own voice by starting and ending the paragraph with your own ideas and wording. Use Caution When Paraphrasing When paraphrasing a source that is not your own, be sure to represent the author's information or opinions accurately and in your own words. Even when paraphrasing an author’s work, you still must provide a citation to that work.

V.  Common Mistakes to Avoid

These are the most common mistakes made in reviewing social science research literature.

• Sources in your literature review do not clearly relate to the research problem;
• You do not take sufficient time to define and identify the most relevant sources to use in the literature review related to the research problem;
• Relies exclusively on secondary analytical sources rather than including relevant primary research studies or data;
• Uncritically accepts another researcher's findings and interpretations as valid, rather than examining critically all aspects of the research design and analysis;
• Does not describe the search procedures that were used in identifying the literature to review;
• Reports isolated statistical results rather than synthesizing them in chi-squared or meta-analytic methods; and,
• Only includes research that validates assumptions and does not consider contrary findings and alternative interpretations found in the literature.

Cook, Kathleen E. and Elise Murowchick. “Do Literature Review Skills Transfer from One Course to Another?” Psychology Learning and Teaching 13 (March 2014): 3-11; Fink, Arlene. Conducting Research Literature Reviews: From the Internet to Paper . 2nd ed. Thousand Oaks, CA: Sage, 2005; Hart, Chris. Doing a Literature Review: Releasing the Social Science Research Imagination . Thousand Oaks, CA: Sage Publications, 1998; Jesson, Jill. Doing Your Literature Review: Traditional and Systematic Techniques . London: SAGE, 2011; Literature Review Handout. Online Writing Center. Liberty University; Literature Reviews. The Writing Center. University of North Carolina; Onwuegbuzie, Anthony J. and Rebecca Frels. Seven Steps to a Comprehensive Literature Review: A Multimodal and Cultural Approach . Los Angeles, CA: SAGE, 2016; Ridley, Diana. The Literature Review: A Step-by-Step Guide for Students . 2nd ed. Los Angeles, CA: SAGE, 2012; Randolph, Justus J. “A Guide to Writing the Dissertation Literature Review." Practical Assessment, Research, and Evaluation. vol. 14, June 2009; Sutton, Anthea. Systematic Approaches to a Successful Literature Review . Los Angeles, CA: Sage Publications, 2016; Taylor, Dena. The Literature Review: A Few Tips On Conducting It. University College Writing Centre. University of Toronto; Writing a Literature Review. Academic Skills Centre. University of Canberra.

Writing Tip

Break Out of Your Disciplinary Box!

Thinking interdisciplinarily about a research problem can be a rewarding exercise in applying new ideas, theories, or concepts to an old problem. For example, what might cultural anthropologists say about the continuing conflict in the Middle East? In what ways might geographers view the need for better distribution of social service agencies in large cities than how social workers might study the issue? You don’t want to substitute a thorough review of core research literature in your discipline for studies conducted in other fields of study. However, particularly in the social sciences, thinking about research problems from multiple vectors is a key strategy for finding new solutions to a problem or gaining a new perspective. Consult with a librarian about identifying research databases in other disciplines; almost every field of study has at least one comprehensive database devoted to indexing its research literature.

Frodeman, Robert. The Oxford Handbook of Interdisciplinarity . New York: Oxford University Press, 2010.

Another Writing Tip

Don't Just Review for Content!

While conducting a review of the literature, maximize the time you devote to writing this part of your paper by thinking broadly about what you should be looking for and evaluating. Review not just what scholars are saying, but how are they saying it. Some questions to ask:

• How are they organizing their ideas?
• What methods have they used to study the problem?
• What theories have been used to explain, predict, or understand their research problem?
• What sources have they cited to support their conclusions?
• How have they used non-textual elements [e.g., charts, graphs, figures, etc.] to illustrate key points?

When you begin to write your literature review section, you'll be glad you dug deeper into how the research was designed and constructed because it establishes a means for developing more substantial analysis and interpretation of the research problem.

Hart, Chris. Doing a Literature Review: Releasing the Social Science Research Imagination . Thousand Oaks, CA: Sage Publications, 1 998.

Yet Another Writing Tip

When Do I Know I Can Stop Looking and Move On?

Here are several strategies you can utilize to assess whether you've thoroughly reviewed the literature:

• Look for repeating patterns in the research findings . If the same thing is being said, just by different people, then this likely demonstrates that the research problem has hit a conceptual dead end. At this point consider: Does your study extend current research?  Does it forge a new path? Or, does is merely add more of the same thing being said?
• Look at sources the authors cite to in their work . If you begin to see the same researchers cited again and again, then this is often an indication that no new ideas have been generated to address the research problem.
• Search Google Scholar to identify who has subsequently cited leading scholars already identified in your literature review [see next sub-tab]. This is called citation tracking and there are a number of sources that can help you identify who has cited whom, particularly scholars from outside of your discipline. Here again, if the same authors are being cited again and again, this may indicate no new literature has been written on the topic.

Onwuegbuzie, Anthony J. and Rebecca Frels. Seven Steps to a Comprehensive Literature Review: A Multimodal and Cultural Approach . Los Angeles, CA: Sage, 2016; Sutton, Anthea. Systematic Approaches to a Successful Literature Review . Los Angeles, CA: Sage Publications, 2016.

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Literature Review Guide: How to organise the review

• What is a Literature Review?
• How to start?
• Picking your research question and searching
• Search strategies and Databases
• How to organise the review
• Examples of Literature Reviews
• Library summary

How to structure your literature review (ignore the monotone voice as advice is good)

How to structure and write your literature review

• Chronological, ie. by date of publication or trend
• Methodological
• Use Cooper's taxonomy to explore and determine what elements and categories to incorporate into your review
• Revise and proofread your review to ensure your arguments, supporting evidence and writing is clear and precise

Cronin, P., Ryan, F. & Coughlan, M. (2008). Undertaking a literature review: A step-by-step approach . British Journal of Nursing, 17 (1), pp.38-43.

Different ways to organise a Literature Review

CHRONOLOGICAL (by date): This is one of the most common ways, especially for topics that have been talked about for a long time and have changed over their history. Organise it in stages of how the topic has changed: the first definitions of it, then major time periods of change as researchers talked about it, then how it is thought about today.

BROAD-TO-SPECIFIC : Another approach is to start with a section on the general type of issue you're reviewing, then narrow down to increasingly specific issues in the literature until you reach the articles that are most specifically similar to your research question, thesis statement, hypothesis, or proposal. This can be a good way to introduce a lot of background and related facets of your topic when there is not much directly on your topic but you are tying together many related, broader articles.

MAJOR MODELS or MAJOR THEORIES : When there are multiple models or prominent theories, it is a good idea to outline the theories or models that are applied the most in your articles. That way you can group the articles you read by the theoretical framework that each prefers, to get a good overview of the prominent approaches to your concept.

PROMINENT AUTHORS : If a certain researcher started a field, and there are several famous people who developed it more, a good approach can be grouping the famous author/researchers and what each is known to have said about the topic. You can then organise other authors into groups by which famous authors' ideas they are following. With this organisation it can help to look at the citations your articles list in them, to see if there is one author that appears over and over.

CONTRASTING SCHOOLS OF THOUGHT : If you find a dominant argument comes up in your research, with researchers taking two sides and talking about how the other is wrong, you may want to group your literature review by those schools of thought and contrast the differences in their approaches and ideas.

Ways to structure your Literature Review

Different ways to organise your literature review include:

• Topical order (by main topics or issues, showing relationship to the main problem or topic)
• Chronological order (simplest of all, organise by dates of published literature)
• Problem-cause-solution order
• General to specific order
• Known to unknown order
• Comparison and contrast order
• Specific to general order
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The Literature Review: 5. Organizing the Literature Review

• 1. Introduction
• 2. Why Do a Literature Review?
• 3. Methods for Searching the Literature
• 4. Analysing the Literature
• 5. Organizing the Literature Review
• 6. Writing the Review

1. Organizing Principles

A literature review is a piece of discursive prose, not a list describing or summarizing one piece of literature after another. It should have a single organizing principle:

• Thematic - organize around a topic or issue
• Chronological - sections for each vital time period
• Methodological - focus on the methods used by the researchers/writers

4. Selected Online Resources

• Literature Review in Education & Behavioral Sciences This is an interactive tutorial from Adelphi University Libraries on how to conduct a literature review in education and the behavioural sciences using library databases
• Writing Literature Reviews This tutorial is from the Writing section of Monash University's Language and Learning Online site
• The Literature Review: A Few Tips on Conducting It This guide is from the Health Services Writing Centre at the University of Toronto
• Learn How to Write a Review of the Literature This guide is part of the Writer's Handbook provided by the Writing Center at the University of Wisconsin-Madison

2. Structure of the Literature Review

Although your literature review will rely heavily on the sources you read for its information, you should dictate the structure of the review. It is important that the concepts are presented in an order that makes sense of the context of your research project.

There may be clear divisions on the sets of ideas you want to discuss, in which case your structure may be fairly clear. This is an ideal situation. In most cases, there will be several different possible structures for your review.

Similarly to the structure of the research report itself, the literature review consists of:

• Introduction

Introduction - profile of the study

• Define or identify the general topic to provide the context for reviewing the literature
• Outline why the topic is important
• Identify overall trends in what has been published about the topic
• Identify conflicts in theory, methodology, evidence, and conclusions
• Identify gaps in research and scholarlship
• Explain the criteria to be used in analysing and comparing the literature
• Describe the organization of the review (the sequence)
• If necessary, state why certain literature is or is not included (scope)

Body - summative, comparative, and evaluative discussion of literature reviewed

For a thematic review:

• organize the review into paragraphs that present themes and identify trends relevant to your topic
• each paragraph should deal with a different theme - you need to synthesize several of your readings into each paragraph in such a way that there is a clear connection between the sources
• don't try to list all the materials you have identified in your literature search

From each of the section summaries:

• summarize the main agreements and disagreements in the literature
• summarize the general conclusions that have been drawn
• establish where your own research fits in the context of the existing literature

5. A Final Checklist

• Have you indicated the purpose of the review?
• Have you emphasized recent developments?
• Is there a logic to the way you organized the material?
• Does the amount of detail included on an issue relate to its importance?
• Have you been sufficiently critical of design and methodological issues?
• Have you indicated when results were conflicting or inconclusive and discussed possible reasons?
• Has your summary of the current literature contributed to the reader's understanding of the problems?

3. Tips on Structure

A common error in literature reviews is for writers to present material from one author, followed by information from another, then another.... The way in which you group authors and link ideas will help avoid this problem. To group authors who draw similar conclusions, you can use linking words such as:

• additionally

When authors disagree, linking words that indicate contrast will show how you have analysed their work. Words such as:

• on the other hand
• nonetheless

will indicate to your reader how you have analysed the material. At other times, you may want to qualify an author's work (using such words as specifically, usually, or generally ) or use an example ( thus, namely, to illustrate ). In this way you ensure that you are synthesizing the material, not just describing the work already carried out in your field.

Another major problem is that literature reviews are often written as if they stand alone, without links to the rest of the paper. There needs to be a clear relationship between the literature review and the methodology to follow.

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Literature Reviews

• "How To" Books
• Examples of Literature Reviews
• Collecting Resources for a Literature Review
• Organizing the Literature Review
• Writing the Literature Review
• Endnote This link opens in a new window
• Evaluating Websites

Organization

Organization of your Literature Review

What is the most effective way of presenting the information? What are the most important topics, subtopics, etc., that your review needs to include? What order should you present them?

Just like most academic papers, literature reviews must contain at least three basic elements: an introduction or background information section; the body of the review containing the discussion of sources; and, finally, a conclusion and/or recommendations section to end the paper.

Introduction: Gives a quick idea of the topic of the literature review, such as the central theme or organizational pattern.

Body: Contains your discussion of sources and is organized either chronologically, thematically, or methodologically (see below for more information on each).

Conclusions/Recommendations: Discuss what you have drawn from reviewing the literature so far. Where might the discussion proceed?

Once you have the basic categories in place, then you must consider how you will present the sources themselves within the body of your paper. Create an organizational method to focus this section even further.

To help you come up with an overall organizational framework for your review, consider the following scenario and then three typical ways of organizing the sources into a review:

You've decided to focus your literature review on materials dealing with sperm whales. This is because you've just finished reading Moby Dick, and you wonder if that whale's portrayal is really real. You start with some articles about the physiology of sperm whales in biology journals written in the 1980's. But these articles refer to some British biological studies performed on whales in the early 18th century. So you check those out. Then you look up a book written in 1968 with information on how sperm whales have been portrayed in other forms of art, such as in Alaskan poetry, in French painting, or on whale bone, as the whale hunters in the late 19th century used to do. This makes you wonder about American whaling methods during the time portrayed in Moby Dick, so you find some academic articles published in the last five years on how accurately Herman Melville portrayed the whaling scene in his novel.

Chronological

If your review follows the chronological method, you could write about the materials above according to when they were published. For instance, first you would talk about the British biological studies of the 18th century, then about Moby Dick, published in 1851, then the book on sperm whales in other art (1968), and finally the biology articles (1980s) and the recent articles on American whaling of the 19th century. But there is relatively no continuity among subjects here. And notice that even though the sources on sperm whales in other art and on American whaling are written recently, they are about other subjects/objects that were created much earlier. Thus, the review loses its chronological focus.

By publication

Order your sources chronologically by publication if the order demonstrates a more important trend. For instance, you could order a review of literature on biological studies of sperm whales if the progression revealed a change in dissection practices of the researchers who wrote and/or conducted the studies.

Another way to organize sources chronologically is to examine the sources under a trend, such as the history of whaling. Then your review would have subsections according to eras within this period. For instance, the review might examine whaling from pre-1600-1699, 1700-1799, and 1800-1899. Using this method, you would combine the recent studies on American whaling in the 19th century with Moby Dick itself in the 1800-1899 category, even though the authors wrote a century apart.

Thematic reviews of literature are organized around a topic or issue, rather than the progression of time. However, progression of time may still be an important factor in a thematic review. For instance, the sperm whale review could focus on the development of the harpoon for whale hunting. While the study focuses on one topic, harpoon technology, it will still be organized chronologically. The only difference here between a "chronological" and a "thematic" approach is what is emphasized the most: the development of the harpoon or the harpoon technology.

More authentic thematic reviews tend to break away from chronological order. For instance, a thematic review of material on sperm whales might examine how they are portrayed as "evil" in cultural documents. The subsections might include how they are personified, how their proportions are exaggerated, and their behaviors misunderstood. A review organized in this manner would shift between time periods within each section according to the point made.

Methodological

A methodological approach differs from the two above in that the focusing factor usually does not have to do with the content of the material. Instead, it focuses on the "methods" of the researcher or writer. For the sperm whale project, one methodological approach would be to look at cultural differences between the portrayal of whales in American, British, and French art work. Or the review might focus on the economic impact of whaling on a community. A methodological scope will influence either the types of documents in the review or the way in which these documents are discussed.

Once you've decided on the organizational method for the body of the review, the sections you need to include in the paper should be easy to figure out. They should arise out of your organizational strategy. In other words, a chronological review would have subsections for each vital time period. A thematic review would have subtopics based upon factors that relate to the theme or issue.

Sometimes, though, you might need to add additional sections that are necessary for your study, but do not fit in the organizational strategy of the body. What other sections you include in the body is up to you. Put in only what is necessary. Here are a few other sections you might want to consider:

Current Situation: Information necessary to understand the topic or focus of the literature review.

History: The chronological progression of the field, the literature, or an idea that is necessary to understand the literature review, if the body of the literature review is not already a chronology.

Methods and/or Standards: The criteria you used to select the sources in your literature review or the way in which you present your information. For instance, you might explain that your review includes only peer-reviewed articles and journals.

Questions for Further Research: What questions about the field has the review sparked? How will you further your research as a result of the review?

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• What is a Literature Review? | Guide, Template, & Examples

What is a Literature Review? | Guide, Template, & Examples

Published on 22 February 2022 by Shona McCombes . Revised on 7 June 2022.

What is a literature review? A literature review is a survey of scholarly sources on a specific topic. It provides an overview of current knowledge, allowing you to identify relevant theories, methods, and gaps in the existing research.

There are five key steps to writing a literature review:

• Search for relevant literature
• Evaluate sources
• Identify themes, debates and gaps
• Outline the structure
• Write your literature review

A good literature review doesn’t just summarise sources – it analyses, synthesises, and critically evaluates to give a clear picture of the state of knowledge on the subject.

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Table of contents

Why write a literature review, examples of literature reviews, step 1: search for relevant literature, step 2: evaluate and select sources, step 3: identify themes, debates and gaps, step 4: outline your literature review’s structure, step 5: write your literature review, frequently asked questions about literature reviews, introduction.

• Quick Run-through
• Step 1 & 2

When you write a dissertation or thesis, you will have to conduct a literature review to situate your research within existing knowledge. The literature review gives you a chance to:

• Demonstrate your familiarity with the topic and scholarly context
• Develop a theoretical framework and methodology for your research
• Position yourself in relation to other researchers and theorists
• Show how your dissertation addresses a gap or contributes to a debate

You might also have to write a literature review as a stand-alone assignment. In this case, the purpose is to evaluate the current state of research and demonstrate your knowledge of scholarly debates around a topic.

The content will look slightly different in each case, but the process of conducting a literature review follows the same steps. We’ve written a step-by-step guide that you can follow below.

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Writing literature reviews can be quite challenging! A good starting point could be to look at some examples, depending on what kind of literature review you’d like to write.

• Example literature review #1: “Why Do People Migrate? A Review of the Theoretical Literature” ( Theoretical literature review about the development of economic migration theory from the 1950s to today.)
• Example literature review #2: “Literature review as a research methodology: An overview and guidelines” ( Methodological literature review about interdisciplinary knowledge acquisition and production.)
• Example literature review #3: “The Use of Technology in English Language Learning: A Literature Review” ( Thematic literature review about the effects of technology on language acquisition.)
• Example literature review #4: “Learners’ Listening Comprehension Difficulties in English Language Learning: A Literature Review” ( Chronological literature review about how the concept of listening skills has changed over time.)

You can also check out our templates with literature review examples and sample outlines at the links below.

Download Word doc Download Google doc

Before you begin searching for literature, you need a clearly defined topic .

If you are writing the literature review section of a dissertation or research paper, you will search for literature related to your research objectives and questions .

If you are writing a literature review as a stand-alone assignment, you will have to choose a focus and develop a central question to direct your search. Unlike a dissertation research question, this question has to be answerable without collecting original data. You should be able to answer it based only on a review of existing publications.

Make a list of keywords

Start by creating a list of keywords related to your research topic. Include each of the key concepts or variables you’re interested in, and list any synonyms and related terms. You can add to this list if you discover new keywords in the process of your literature search.

• Social media, Facebook, Instagram, Twitter, Snapchat, TikTok
• Body image, self-perception, self-esteem, mental health
• Generation Z, teenagers, adolescents, youth

Search for relevant sources

Use your keywords to begin searching for sources. Some databases to search for journals and articles include:

• Your university’s library catalogue
• Google Scholar
• Project Muse (humanities and social sciences)
• Medline (life sciences and biomedicine)
• EconLit (economics)
• Inspec (physics, engineering and computer science)

You can use boolean operators to help narrow down your search:

Read the abstract to find out whether an article is relevant to your question. When you find a useful book or article, you can check the bibliography to find other relevant sources.

To identify the most important publications on your topic, take note of recurring citations. If the same authors, books or articles keep appearing in your reading, make sure to seek them out.

You probably won’t be able to read absolutely everything that has been written on the topic – you’ll have to evaluate which sources are most relevant to your questions.

For each publication, ask yourself:

• What question or problem is the author addressing?
• What are the key concepts and how are they defined?
• What are the key theories, models and methods? Does the research use established frameworks or take an innovative approach?
• What are the results and conclusions of the study?
• How does the publication relate to other literature in the field? Does it confirm, add to, or challenge established knowledge?
• How does the publication contribute to your understanding of the topic? What are its key insights and arguments?
• What are the strengths and weaknesses of the research?

Make sure the sources you use are credible, and make sure you read any landmark studies and major theories in your field of research.

You can find out how many times an article has been cited on Google Scholar – a high citation count means the article has been influential in the field, and should certainly be included in your literature review.

The scope of your review will depend on your topic and discipline: in the sciences you usually only review recent literature, but in the humanities you might take a long historical perspective (for example, to trace how a concept has changed in meaning over time).

Remember that you can use our template to summarise and evaluate sources you’re thinking about using!

Take notes and cite your sources

As you read, you should also begin the writing process. Take notes that you can later incorporate into the text of your literature review.

It’s important to keep track of your sources with references to avoid plagiarism . It can be helpful to make an annotated bibliography, where you compile full reference information and write a paragraph of summary and analysis for each source. This helps you remember what you read and saves time later in the process.

You can use our free APA Reference Generator for quick, correct, consistent citations.

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To begin organising your literature review’s argument and structure, you need to understand the connections and relationships between the sources you’ve read. Based on your reading and notes, you can look for:

• Trends and patterns (in theory, method or results): do certain approaches become more or less popular over time?
• Themes: what questions or concepts recur across the literature?
• Debates, conflicts and contradictions: where do sources disagree?
• Pivotal publications: are there any influential theories or studies that changed the direction of the field?
• Gaps: what is missing from the literature? Are there weaknesses that need to be addressed?

This step will help you work out the structure of your literature review and (if applicable) show how your own research will contribute to existing knowledge.

• Most research has focused on young women.
• There is an increasing interest in the visual aspects of social media.
• But there is still a lack of robust research on highly-visual platforms like Instagram and Snapchat – this is a gap that you could address in your own research.

There are various approaches to organising the body of a literature review. You should have a rough idea of your strategy before you start writing.

Depending on the length of your literature review, you can combine several of these strategies (for example, your overall structure might be thematic, but each theme is discussed chronologically).

Chronological

The simplest approach is to trace the development of the topic over time. However, if you choose this strategy, be careful to avoid simply listing and summarising sources in order.

Try to analyse patterns, turning points and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred.

If you have found some recurring central themes, you can organise your literature review into subsections that address different aspects of the topic.

For example, if you are reviewing literature about inequalities in migrant health outcomes, key themes might include healthcare policy, language barriers, cultural attitudes, legal status, and economic access.

Methodological

If you draw your sources from different disciplines or fields that use a variety of research methods , you might want to compare the results and conclusions that emerge from different approaches. For example:

• Look at what results have emerged in qualitative versus quantitative research
• Discuss how the topic has been approached by empirical versus theoretical scholarship
• Divide the literature into sociological, historical, and cultural sources

Theoretical

A literature review is often the foundation for a theoretical framework . You can use it to discuss various theories, models, and definitions of key concepts.

You might argue for the relevance of a specific theoretical approach, or combine various theoretical concepts to create a framework for your research.

Like any other academic text, your literature review should have an introduction , a main body, and a conclusion . What you include in each depends on the objective of your literature review.

The introduction should clearly establish the focus and purpose of the literature review.

If you are writing the literature review as part of your dissertation or thesis, reiterate your central problem or research question and give a brief summary of the scholarly context. You can emphasise the timeliness of the topic (“many recent studies have focused on the problem of x”) or highlight a gap in the literature (“while there has been much research on x, few researchers have taken y into consideration”).

Depending on the length of your literature review, you might want to divide the body into subsections. You can use a subheading for each theme, time period, or methodological approach.

As you write, make sure to follow these tips:

• Summarise and synthesise: give an overview of the main points of each source and combine them into a coherent whole.
• Analyse and interpret: don’t just paraphrase other researchers – add your own interpretations, discussing the significance of findings in relation to the literature as a whole.
• Critically evaluate: mention the strengths and weaknesses of your sources.
• Write in well-structured paragraphs: use transitions and topic sentences to draw connections, comparisons and contrasts.

In the conclusion, you should summarise the key findings you have taken from the literature and emphasise their significance.

If the literature review is part of your dissertation or thesis, reiterate how your research addresses gaps and contributes new knowledge, or discuss how you have drawn on existing theories and methods to build a framework for your research. This can lead directly into your methodology section.

A literature review is a survey of scholarly sources (such as books, journal articles, and theses) related to a specific topic or research question .

It is often written as part of a dissertation , thesis, research paper , or proposal .

There are several reasons to conduct a literature review at the beginning of a research project:

• To familiarise yourself with the current state of knowledge on your topic
• To ensure that you’re not just repeating what others have already done
• To identify gaps in knowledge and unresolved problems that your research can address
• To develop your theoretical framework and methodology
• To provide an overview of the key findings and debates on the topic

Writing the literature review shows your reader how your work relates to existing research and what new insights it will contribute.

The literature review usually comes near the beginning of your  dissertation . After the introduction , it grounds your research in a scholarly field and leads directly to your theoretical framework or methodology .

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Literature Review - what is a Literature Review, why it is important and how it is done

• Strategies to Find Sources

Evaluating Literature Reviews and Sources

Reading critically, tips to evaluate sources.

• Tips for Writing Literature Reviews
• Writing Literature Review: Useful Sites
• Citation Resources
• Other Academic Writings
• Useful Resources

A good literature review evaluates a wide variety of sources (academic articles, scholarly books, government/NGO reports). It also evaluates literature reviews that study similar topics. This page offers you a list of resources and tips on how to evaluate the sources that you may use to write your review.

• A Closer Look at Evaluating Literature Reviews Excerpt from the book chapter, “Evaluating Introductions and Literature Reviews” in Fred Pyrczak’s Evaluating Research in Academic Journals: A Practical Guide to Realistic Evaluation , (Chapter 4 and 5). This PDF discusses and offers great advice on how to evaluate "Introductions" and "Literature Reviews" by listing questions and tips. First part focus on Introductions and in page 10 in the PDF, 37 in the text, it focus on "literature reviews".
• Tips for Evaluating Sources (Print vs. Internet Sources) Excellent page that will guide you on what to ask to determine if your source is a reliable one. Check the other topics in the guide: Evaluating Bibliographic Citations and Evaluation During Reading on the left side menu.

To be able to write a good Literature Review, you need to be able to read critically. Below are some tips that will help you evaluate the sources for your paper.

Reading critically (summary from How to Read Academic Texts Critically)

• Who is the author? What is his/her standing in the field.
• What is the author’s purpose? To offer advice, make practical suggestions, solve a specific problem, to critique or clarify?
• Note the experts in the field: are there specific names/labs that are frequently cited?
• Pay attention to methodology: is it sound? what testing procedures, subjects, materials were used?
• Note conflicting theories, methodologies and results. Are there any assumptions being made by most/some researchers?
• Theories: have they evolved overtime?
• Evaluate and synthesize the findings and conclusions. How does this study contribute to your project?

Useful links:

• How to Read a Paper (University of Waterloo, Canada) This is an excellent paper that teach you how to read an academic paper, how to determine if it is something to set aside, or something to read deeply. Good advice to organize your literature for the Literature Review or just reading for classes.

Criteria to evaluate sources:

• Authority : Who is the author? what is his/her credentials--what university he/she is affliliated? Is his/her area of expertise?
• Usefulness : How this source related to your topic? How current or relevant it is to your topic?
• Reliability : Does the information comes from a reliable, trusted source such as an academic journal?

Useful site - Critically Analyzing Information Sources (Cornell University Library)

• << Previous: Strategies to Find Sources
• Next: Tips for Writing Literature Reviews >>
• Last Updated: Jul 3, 2024 10:56 AM
• URL: https://lit.libguides.com/Literature-Review

The Library, Technological University of the Shannon: Midwest

Writing the Literature Review

Barry Mauer and John Venecek

• The Literature Review

What is the Purpose of the Review?

What is the scope of the review, strategies for getting started, types of literature reviews, composition guidelines, how to locate reviews by discipline, key takeaways.

We also provide the following activities:

Types of Literature Reviews [Refresher]

Writing the literature review [refresher], the literature review [1].

Conducting a literary studies research project involves time and effort, with much of it going towards the development of a literature review . A literature review might fill several pages of your research paper and usually appears soon after an introduction but before you present your detailed argument. A literature review provides your audience with an overview of the available research about your area(s) of study, including the literary work, your theory, and methodology. The literature review demonstrates how these scholarly discussions have changed over time, and it allows you to position your research in relation to research that has come before yours. Your aim is to present the discussion up to this point. Depending on the nature of the assignment, you may also include your critical commentary on prior research, noting among this material the weaker and stronger arguments, breakthroughs and dead ends, blind spots and opportunities, the invention of key terms and methods, mistakes as well as misreadings, and so on.

Once you have gathered the research materials you need for your literature review, you have another task: conducting an analysis on the research to see where your original contribution fits into the scholarly conversation. As the saying goes, “we are standing on the shoulders of giants.” Your job is to show a portrait of these giants to your audience, and to show how your work relates to the portrait. On many scholarly topics, literature reviews already exist. You may refer to such existing reviews within your own, indicating any materials might have been overlooked, new developments that have arisen since the publication of the existing literature review, and new perspectives or insights you have about the materials.

Some beginning researchers try to tear down the work of other researchers in an effort to make their own work look good by comparison. It rarely works. First, it tends to make your audience skeptical of your claims. Second, it ignores the fact that even the mistakes, blind spots, and failures of other researchers contribute something to our knowledge. Albert Einstein didn’t disrespect Sir Isaac Newton by saying Newton’s theory of space was wrong and terrible and that Einstein’s own theory was great by comparison. He built upon Newton’s work, showing how it could be improved. If, however, a researcher willfully set out to deceive or distort or to tear down the work of other scholars without good reason, then their work does not deserve such deference.

Most literature reviews appear after the introduction. It presents your reader with relevant information about the scholarly discussion up to now. Later in your paper, you discuss your contribution. Before you begin work on your literature review, let’s discuss what we mean by “literature”; understand the purpose and scope of the review; establish criteria for selecting, organizing, and interpreting your findings; and discuss how to connect your findings to your research question.

Many students seek to “find sources that agree with my claim or idea.” That approach is too narrow, in our view. If we use such an approach, we may get the following results:

• Because we can find sources that agree with almost any claim, readers will wonder whether your claims are weak and the sources are cherry picked.
• While literary scholars sometimes cite authorities to support their claims, they don’t rely only on authority. They respect authority, but not too much. Your own claims need to rely more on evidence (from the literary text, historical and biographical information), and your critical and creative reasoning skills.
• Scholarship is a conversation; thus, the goal is less about finding agreement and more about joining the conversation with the aim of making a valuable contribution to the discussion.

The literature review provides your reader with an overview of the existing research about your topic or problem. It provides the context necessary for your reader to catch up with the scholarly conversation and then to appreciate the value of your contribution to it. The literature review sharpens the focus of your research and demonstrates your knowledge and understanding of the scholarly conversation around your topic, which, in turn, helps establish your credibility as a researcher.

Creating the literature review involves more than gathering citations. It is a qualitative process through which you will discover what is already known about your topic, and identify the key authorities, methods, and theoretical foundations, so you can begin to position your contributions within the scholarly conversation.

Defining the scope of your review will also help you establish criteria to determine the relevance of the sources you are finding. At this stage, you are not reading in-depth; instead, you are skimming through what has already been published and identifying the major concepts, theories, methodologies, and methods present within these published works. You should also be identifying connections, tensions, and contradictions within the already published works of your topic or problem. This involves building on the knowledge of others and understanding what methods, measures, and models we have inherited from previous researchers in our field.

Literature Reviews: Common Errors Made When Conducting a Literature Review [12 min 22 sec]

Video provided courtesy of the Center for Quality Research (CQR)

A literature review helps your reader understand the relationship of your research project to the work of other scholars. It covers the existing knowledge about a problem, and allows you to show the relevance/significance of your contribution to the discussion. Your reader may or may not have read scholarly literature about the theories, methodologies, and literary works you are discussing. But they want to know that you have read it and have thought about it. Your literature review provides not only a summary of the existing scholarship for readers; it also offers your perspective on it.

Begin your work on the literature review by synthesizing the various sources in your annotated bibliography .

For advice on Synthesizing Sources, consider the following from The Purdue Online Writing Lab: [2]

Note that  synthesizing is not the same as summarizing .

• A summary restates the information in one or more sources without providing new insight or reaching new conclusions.
• A synthesis draws on multiple sources to reach a broader conclusion.
• Don’t force a relationship between sources if there isn’t one. Not all of your sources have to complement one another.
• Do your best to highlight the relationships between sources in very clear ways.
• Don’t ignore any outliers in your research. It’s important to take note of every perspective (even those that disagree with your broader conclusions).

Not all humanities research projects contain literature reviews, but many do. Keep in mind that the type of literature review you choose (see list below) pertains to the secondary research – other scholarly sources – and not to the primary literary work. For instance, a literature review about Kate Chopin’s writing will be your thoughts about the scholarship on Chopin and not about Chopin’s text itself. You are summarizing what you see in the scholarly literature about Chopin’s writing. The literature review puts you in the position of authority not just on Chopin’s writing but on the scholarship about her writing. You are seeking to understand what scholars have said about her work. Scholars might belong to different schools of thought (psychoanalytic, feminist, Marxist, etc.). They might make different arguments about Chopin. They might use different methodological approaches. 

If your research involves two or more theories, such as psychology and genre studies, you may need to create multiple literature reviews, one for each theory or methodology. If the theories overlap with each other significantly (i.e., Marxism and Cultural Studies), you may combine them. Your literature review need not include everything about the subject area – you would need to write a book to cover a single theory – but only those concepts and methods that are most relevant to your research problem.

Factors to Consider When Developing Your Literature Review

• Determine the Scope : How broad or narrow should your literature review be? You may want to focus on recent scholarship only, or on a particular school of thought in the literature. Your scope is determined by your purpose; what is it you aim to achieve with your research?
• Establish Criteria : We discussed the importance of defining the purpose and scope of your review on the previous page, but it’s worth reviewing here as well. This step will help you establish important criteria and focus your searching. For example, how many sources will you need? What types of sources (primary, secondary, statistics, media)? Is currency important? Do you know who the prominent authors or theorists are in your subject area? Take some time to map out these or other important factors before you begin searching journals and databases.
• Consider Your Audience : Unlike a work cited page or an annotated bibliography, both of which are lists of sources, a literature review is essayistic and can be considered a precursor to your final paper. Therefore, it should be written in your own voice, and it should be geared toward a specific audience. Considering audience during this early stage will help focus your final paper as well.
• Find Models : We’ll discuss the different types of literature reviews and how to locate examples in the section below. However, even if you’re undecided about what type of review will work best for you, you may want to review some example literature reviews to get a sense of what they look like before you begin your own.

One piece of advice before starting: look for existing literature reviews on your area of scholarship. You can build on the work that other scholars have put into reviewing the scholarly literature. There’s no need to completely “reinvent the wheel” if some of the work is already done.

Scholars sometimes publish “stand-alone” literature reviews that are not part of a larger work; such literature reviews are valuable contributions to the field, as they summarize the state of knowledge for other scholars.

Maria J. Grant and Andrew Booth’s “A Typology of Reviews” identifies 14 distinct types of literature reviews. Further, the UCLA library created a chart to complement the article and for easy comparison of those 14 types of reviews. This section provides a brief summary of the most common literature reviews. For a more complete analysis, please see the full article and the chart .

To choose the most appropriate structure, put yourself in your reader’s shoes and think through their need for information. The literature review is about providing context for your contribution. How much context do people need? Keep it to the minimum necessary; compressing a lot of information into a small amount of text is a must.

These structures are not meant to be straightjackets but tools to help you organize your research. If you find that the tool is working, then keep using it. If not, switch tools or modify the one you are using. Keep in mind that the types of literature reviews are just different ways of organizing information. So, you can discuss literary trends without organizing your review of secondary literature by trend; your discussion can be organized by theory or theme, for examples. In our literature reviews, we are not recounting other scholars’ arguments at length but merely providing key concepts so we can summarize the discussion so far and position our own claims. You don’t have to adhere strictly to one structure or another. They are just organizing tools that help you manage your material (and help your reader make sense of it).

Types of Reviews

• Traditional or narrative reviews : This approach will generate a comprehensive, critical analysis of the published research on your topic. However, rather than merely compiling as many sources as possible, use this approach to establish a theoretical framework for your paper, establish trends, and identify gaps in the research. This process should bring your research question into clearer focus and help define a thesis that you will argue for in your paper. This is perhaps the most common and general type of literature review. The examples listed below are all designed to serve a more specific purpose.
• Argumentative : The purpose of an argumentative literature review is to select sources for the purpose of supporting or refuting a specific claim. While this type of review can help the author make a strong case for or against an issue, they can also be prone to claims of bias. Later in this textbook, we will read about the distinction between warranted and unwarranted bias . One is ok and the other is not.
• Chronological : A chronological review is used when the author wants to demonstrate the progression of how a theory, methodology, or issue has progressed over time. This method is most effective when there is a clear chronological path to the research about a specific historical event or trend as opposed to a more recursive theoretical concept.
• By trend : This is similar to the chronological approach except it focuses on clearly-defined trends rather than date ranges. This would be most appropriate if you want to illustrate changing perspectives or attitudes about a given issue when specific date ranges are less important than the ebb and flow of the trend.
• Thematic : In this type of literature review, the author will select specific themes that he or she feels are important to understanding a larger topic or concept. Then, the author will organize the sources around those themes, which are often based on relevance or importance. The value of this method is that the process of organizing the review by theme is similar to constructing an argument. This can help the author see how resources connect to each other and determine how as well as why specific sources support their thesis.
• Theoretical : The goal of this type of review is to examine how theory has shaped the research on a given topic. It establishes existing theoretical models, their connections, and how extensively they have been developed in the published research. For example, Jada applied critical race theory to her analysis of Sonny’s Blues , but she might also consider conducting a more comprehensive review of other theoretical frameworks such as feminism, Marxism, or postmodernism. Doing so could provide insight into alternate readings, and help her identify theoretical gaps such as unexplored or under-developed approaches to Baldwin’s work.
• Methodological : The approach focuses on the various methodologies used by researchers in a specific area rather than an analysis of their findings. In this case, you would create a framework of approaches to data collection related to your topic or research question. This is perhaps more common in education or the social and hard sciences where published research often includes a methods section, but it is sometimes appropriate for the digital humanities as well.
• Scoping : The aim of a scoping review is to provide a comprehensive overview or map of the published research or evidence related to a research question. This might be considered a prelude to a systematic review that would take the scoping review one step further toward answering a clearly defined research question. See below for more details.
• Systematic : The systematic review is most appropriate when you have a clearly-defined research question and have established criteria for the types of sources you need. In this way, the systematic review is less exploratory than other types of reviews. Rather, it is comprehensive, strategic, and focused on answering a specific research question. For this reason, the systematic review is more common in the health and social sciences, where comprehensiveness is more important. Literature reviews in the Humanities are not usually exhaustive but tend to show only the most representative or salient developments in the scholarship.
• Meta-analysis : Does your research deal with statistics or large amounts of data? If so, then a meta-analysis might be best for you rather than providing a critical review, the meta-analysis will summarize and synthesize the results of numerous studies that involve statistics or data to provide a more comprehensive picture than would be possible from just one study.

An argumentative literature review presents and takes sides in scholarly arguments about the literary work. It makes arguments about other scholars’ work. It does not necessarily involve a claim that the literary work is itself making an argument. Likewise, a chronological literature review presents the scholarly literature in chronological order.

You don’t need to keep strictly to one type. Scholars often combine features from various types of literature reviews. A sample review that combines the follow types –

• Argumentative
• Theoretical
• Methodological

– is the excellent work of Eiranen, Reetta, Mari Hatavara, Ville Kivimäki, Maria Mäkelä & Raisa Maria Toivo (2022) “ Narrative and Experience: Interdisciplinary Methodologies between History and Narratology , ” Scandinavian Journal of History , 47:1, 1-15

When writing your literature review, please follow these pointers:

• Conduct systematic searches
• Use Evidence
• Be Selective
• Use Quotes Sparingly
• Summarize & Synthesize
• Use Caution when Paraphrasing
• Use Your Own Voice

Advice from James Mason University’s “Literature Reviews: An Overview”

A note on synthesizing : Don’t make the common mistake of summarizing individual studies or articles one after the other. The goal is to synthesize — that is, to make observations about groups of studies. Synthesis often uses language like this:

• Much of the literature on [topic x ] focuses on [major themes].
• In recent years, researchers have begun investigating [facets a , b , and c ] of [topic x ].
• The studies in this review of [topic x ] confirm / suggest / call into question / support [idea / practice / finding / method / theory / guideline y ].
• In the reviewed studies [variable x ] was generally associated with higher / lower rates of [outcome y ].
• A limitation of some / most / all of these studies is [ y ].

Please see this sample annotated literature review  from James Mason University.

Structure of a literature review [2]

• Problematization: The 2 to 3 pages of problematization are a distinct, iterative, step. It may take doing such a statement a few times before moving forward to writing the actual paper.
• Search: Write down your keyword sets, your updated keyword sets, and databases. It is perfectly within a reviewer’s rights to ask for these details.
• Summary: Really getting to know major themes requires some annotation of articles. You want to identify core papers and themes and write about them. This helps you really learn the material. [ChatGPT or Wikipedia are no substitute for deep engagement with a paper.]
• Argument: Either outline or create a slide deck that help you express the arguments in your paper. Read them out loud. Have friends look at them. Present them. [Every literature review has an argument. If not, it’s a summary. A summary does not merit publication in a top outlet.]
• Unpacking: Once you’ve nailed the short pitch, unpack the full argument. [ a) Take time in each major section to map out a) the argument, b) the supporting evidence, and the takeaway. b) Take those major sections, reconcile them, make sure they don’t overlap, then move on to writing. c) Sketch out the paper’s sections, tables, figures, and appendices.]
• Writing: Writing is the easy part. You can always put words to the screen. [Revising and improving is hard. Make time to write every day. Improving requires feedback. Find a writing partner to give feedback. Create your tables and figures. Write to them. Make sure the words in the paper align to the visuals.]
• Communicate: When the paper is done, go back and create a paper presentation. [I do this for the papers that I’m most serious about. The act of storyboarding helps me sort out the small pieces of the story that don’t fit together. If I really want it to succeed, I present it. The act of presenting helps me get it right. My best papers sometimes take seven or eight presentations to get it right. Then I return to the paper and fine tune it. Only then, does it have a shot at a top outlet.]

Literature reviews can be published as part of a scholarly article, often after the introduction and sometimes with a header, but they can also be published as a standalone essay. To find examples of what reviews look like in your discipline, choose an appropriate subject database (such as MLA for literary criticism) and conduct a keyword search with the term “Literature Review” added in quotes:

Not only do these examples demonstrate how to structure different types of literature reviews, but some offer insights into trends and directions for future research. In the next section, we’ll take a closer look at some reading strategies to help guide you through this process.

Since scholars already have produced literature reviews on various scholarly conversations, you don’t always need to “reinvent the wheel” (start a literature review from nothing). You can find a published literature review and update it or amend it; scholars do that all the time. However, you must properly cite work you incorporate from others.

• What types of literature review will you be using for your research project? Why did you make this selection over others? If you haven’t made a selection yet, which types are you considering?
• What specific challenges do you face in following a literature review structure?
• If there are any elements of your assignment that need clarification, please list them.
• What was the most important lesson you learned from this page? What point was confusing or difficult to understand?
• In the “Back Matter” of this book, you will find a page titled “Rubrics.” On that page, we provide a rubric for Creating a Literature Review ↵
• Richard West, Brigham Young University, amended by Jason Thatcher, Temple University - https://www.linkedin.com/posts/jason-thatcher-0329764_academicwriting-topten2023-activity-7146507675021766656-BB0O ↵

Writing the Literature Review Copyright © 2021 by Barry Mauer and John Venecek is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License , except where otherwise noted.

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• Lesson 1: What is a Literature Review

Literature Reviews in the Sciences

• Introduction
• Lesson 2: Fundamental Research Skills
• Lesson 3: Fundamental Writing Skills
• Lesson 4: Resources

What is a literature review? As stated earlier, a literature review is not a well-defined genre. Broadly speaking, a literature review is a single publication, or an element of a long publication, where a topic or research question is explored by examining a large body of prior publications relevant to that topic or research question. Literature review publications tend to self-identify as literature reviews by using those words in the title and in the abstract and body of the work. Literature review publications have extensive reference lists and a textual narrative that examines the content of the articles in that reference list. Article databases often allow you to limit results to literature reviews with the click of a button. Literature reviews are numerous and not difficult to locate.

Producing a literature review is a much different process than simply finding one to read. Literature reviews are diverse and dynamic because of the interrelationships among four major rhetorical features: type, form, purpose, and audience. Understanding these features can help you create an efficient research and writing plan, and ultimately craft a compelling final document. You may have observed these features and interrelationships among the review articles you’ve read.

Let’s delve into them.

Rhetorical Feature 1: Type

Literature reviews can be classified into many types based on characteristics like how the source material is found, the reason they are produced, and what they look like in their final form. New types continually evolve—a recent  piece of research identified 48 different literature review types !

Let’s look at three fundamental types of published literature reviews:

A narrative literature review is extremely common. You have probably read many literature reviews of this type. You may be tasked to produce a literature review of this type many times in your career. A narrative review uses past published research to tell a story about a topic. In the sciences, a narrative review can bring the reader up to date on an evolving research area, establish the scientific rationale for new research explorations, or provide a history of knowledge on a particular topic. They provide overviews or expert opinions grounded in prior published research on a topic. They are typically produced by a single author, or a small group of authors. A narrative literature review can be educational and informative for subject matter experts or non-experts.

What differentiates a narrative review from other review types is what is missing: a traditional narrative review typically does not follow a standardized method for locating the literature to be reviewed. Traditionally, the assumption is that the reader trusts the expertise of the author, and the review itself doesn’t necessarily follow a standard structure. The narrative review does not typically provide detailed information about how the prior research was located, or why some publications were chosen for inclusion over others. Narrative reviews can disclose their method for locating literature, and clarify the authors’ inclusion/exclusion criteria. This is generally helpful to the reader and adds credibility to the author’s words, but it is not a predominant element of the narrative review text. A traditional narrative review usually summarizes the take-home messages of the literature being reviewed, but doesn’t attempt to synthesize quantitative data from multiple studies into a single finding using statistical methods.

It is likely that most literature reviews you will write will be of the narrative review type.

A systematic review is a literature review that follows a highly specific protocol from start to finish. A systematic review of the literature intends to answer a specific research question. Instead of conducting laboratory or field research, a comprehensive search of all literature is conducted using a strict and reproducible search protocol that is designed ahead of time and made explicit in detail. The literature being searched can be published or unpublished.

Selection of articles to be included in the review also follows predetermined inclusion and exclusion criteria, and should involve multiple reviewers.  A systematic review is actually a research study that uses published literature as data.  Systematic reviews should never be undertaken alone, and like other forms of research, require team collaboration and significant time to conduct. The search and selection process for the literature to be reviewed is a significant portion of the systematic review text.

A narrative review can be conducted with methodological transparency, but that transparency alone does not transform it into a systematic review.

Meta-analysis

A meta-analysis is a sub-type of systematic reviews. A meta-analysis seeks to answer a specific research question using the literature as data. After the rigorous search and selection process is completed, the quantitative data in the individual studies selected for the review is extracted and synthesized (combined) statistically to achieve a result that has higher statistical power than the results of the individual studies. A meta-analysis is a literature review type as well as a research methodology.

The final activity of quantitative synthesis of data from multiple studies is the hallmark characteristic of a meta-analysis and is what transforms a systematic review into a meta-analysis. As a sub-type of systematic reviews, meta-analyses also require comprehensive review of the literature conducted with a specific protocol and adhering to methodological guidelines. Likewise, meta-analyses also investigate a specific research question. The search and selection process, as well as the data analysis, is a significant portion of the published meta-analysis. This type of literature review should also be conducted with a team, and will require significant time.

Questions to ask:

• What type of literature review do I need to write?
• Am I familiar with that type? What are its identifying characteristics?
• Are there guidelines for this type within my discipline that I can use to guide my workflow?

Rhetorical Feature 2: Form

As you might expect, the form that a literature review takes is closely related to its type. Literature reviews might be stand-alone publications that constitute a research study itself, part of a larger research project and publication, or part of a grant proposal.

Stand-alone review

Stand-alone reviews are frequently (but not always) themselves scholarly contributions to a field and published in a peer-reviewed journal. They may, either directly or indirectly, seek to move scholarly conversation and professional practice in a particular direction. Stand-alone reviews present the objective, methodology, and findings of their own internal research question.  Systematic reviews  and  meta-analyses  are most frequently published as stand-alone reviews.

Part of a larger research project

This may be the form that you are most familiar with. It tends to coincide with the  narrative review  type. Literature reviews are a requirement for theses and dissertations, as well as for most peer-reviewed articles (when the article is not itself a stand-alone review). In the case of theses and dissertations, the literature review frequently takes the form of a chapter with its own introduction, clearly defined sections, and conclusion. However, it can also take the form of a chapter section, typically as part of the introduction. In peer-reviewed articles, the literature review likewise takes the form of a section within the larger publication, typically as part of the introduction.

Annotated Article

Open Annotated Article in a new window

Part of a grant proposal

The literature review is a common feature in grant proposals as well, though it may not be as obvious as a dissertation chapter titled “Review of the Literature.” Frequently, a brief  narrative  literature review will be part of the (you guessed it!) “narrative” component of a grant proposal. (Check out  Lesson 4 of the Libraries’ micro-course on Grants & Funding  for more information about writing grant proposals.) In the case of research grants—like you might write for the NSF, NIH, USDA, or UW-Madison Graduate School—the literature review will most frequently occur within an “introduction” or “background” section of the project narrative.

• What form must my literature review take?
• Can I describe the general structure or organization typical of that form?
• What specific formal features have I noticed in examples from my field?

Rhetorical Feature 3: Purpose

Any single literature review often serves multiple purposes, so it will be important for you to understand what it is your literature review is meant to do on a few different levels. As you might guess, the purpose(s) of your literature review will strongly depend on its audience, type, and form.

There is one overriding purpose across nearly all literature reviews, however, which is to situate your research within relevant, ongoing conversations.

Situate your research within relevant, ongoing conversations

Imagine, for a moment, what it would feel like to read a scientific article without a narrative literature review incorporated into the text… You would probably have lots of questions! For instance, “What have other people researched in this area? What did they find? What were the implications, and how does this study support or complicate them? What were the limitations of past research, and how is this study’s approach different?”

The same questions could be asked of a dissertation or grant proposal without a literature review, and systematic reviews and meta-analyses simply wouldn’t exist! The most important thing your literature review needs to do is to summarize and synthesize existing research in a way that creates space for a new perspective—your perspective—to enter the conversation.

Depending on its type, form, and audience, your literature review might also seek to:

• Especially when a literature review is part of a thesis or dissertation project, one of its purposes may be to demonstrate your deep knowledge of the research area to an audience of specialists. The research project itself serves as a testament to your readiness to enter an industrial or scholarly profession, and the literature review specifically testifies to your knowledge of relevant research and your ability to synthesize that research into a coherent narrative.
• If your literature review is part of a grant proposal, it will likely need to communicate the broader impact of your research to an audience of non-specialists. Often, that impact will be framed within the context of real-world problems or challenges that your research aims to address. While your research project as a whole might propose changes in professional practice, public policy, or manufacturing products, the literature review can help you to establish the context for that change by providing an overview of what has and has not been done already.
• In the case of systematic reviews and meta-analyses, one major purpose must be to contribute new knowledge to the field through the review itself. Remember, these types of reviews are research studies themselves, whereas narrative literature reviews summarize and synthesize other research.
• What purpose(s) do I have in writing this literature review?
• What is my literature review supposed to accomplish?
• How is each purpose of my review related to the audience I’m writing for? To the type and form of the review?

Rhetorical Feature 4: Audience

Who will be engaging with your literature review? This element is closely tied to purpose and will impact choices you make while writing. Some audiences may be particularly interested in your literature review due to its type and form. The type and form of your review may also require particular writing conventions.

Specialists

What type of specialized knowledge or experience does your intended audience likely have? Is it likely that your intended audience has deep knowledge of your discipline and area of expertise? You may be able to avoid explanatory passages in your writing by assuming common knowledge or experiences. If your literature review is likely to challenge a status quo within a research area, you may need to devote more text to justifying the challenge. Also, readers who have specialized knowledge in your same area are likely to also know the literature well. Establishing and disclosing your inclusion/exclusion criteria, even in a narrative literature review, can help you respond to challenges.

For instance, suppose a senior faculty member, your advisor, or a peer-reviewer questions why you included certain publications in your review but did not include specified other articles. You may need to defend your choices, and having clearly defined inclusion/exclusion criteria already established will help you form your response to a challenge.

Non-specialists

We are defining a non-specialist as a person whose specialized knowledge is within a different scientific context than yours, or doesn’t run as deeply as yours. If you anticipate that your readership will include persons outside of your specific discipline, you may need to devote space to explaining the concepts and connections you are making so that their significance is readily apparent. For instance, if your literature review is a component of a grant application, the reviewers will likely have deep, specialized knowledge of their own, but not necessarily within your precise research area. It is important to not assume that they will automatically see how your literature review supports your funding need. A non-specialist may also not have a deep knowledge of the literature in your area and, as a critical reader, will want an understanding of your inclusion/exclusion criteria as well.

Questions to Ask:

• What audiences are likely to engage with my literature review?
• What audiences would I like to engage with my literature review?
• What are the concepts, nuances, methods, paradigms, intellectual history, or applications that I understand deeply when I engage with my specialty’s literature? Which of these is important to clarify so a non-specialist can engage purposefully with my literature review?

Rhetorical Features Review

Open Rhetorical Features Review in a new window

Want to create or adapt books like this? Learn more about how Pressbooks supports open publishing practices.

Chapter 7: Synthesizing Sources

Learning objectives.

At the conclusion of this chapter, you will be able to:

• synthesize key sources connecting them with the research question and topic area.

7.1 Overview of synthesizing

7.1.1 putting the pieces together.

Combining separate elements into a whole is the dictionary definition of synthesis.  It is a way to make connections among and between numerous and varied source materials.  A literature review is not an annotated bibliography, organized by title, author, or date of publication.  Rather, it is grouped by topic to create a whole view of the literature relevant to your research question.

Your synthesis must demonstrate a critical analysis of the papers you collected as well as your ability to integrate the results of your analysis into your own literature review.  Each paper collected should be critically evaluated and weighed for “adequacy, appropriateness, and thoroughness” ( Garrard, 2017 ) before inclusion in your own review.  Papers that do not meet this criteria likely should not be included in your literature review.

Begin the synthesis process by creating a grid, table, or an outline where you will summarize, using common themes you have identified and the sources you have found. The summary grid or outline will help you compare and contrast the themes so you can see the relationships among them as well as areas where you may need to do more searching. Whichever method you choose, this type of organization will help you to both understand the information you find and structure the writing of your review.  Remember, although “the means of summarizing can vary, the key at this point is to make sure you understand what you’ve found and how it relates to your topic and research question” ( Bennard et al., 2014 ).

As you read through the material you gather, look for common themes as they may provide the structure for your literature review.  And, remember, research is an iterative process: it is not unusual to go back and search information sources for more material.

At one extreme, if you are claiming, ‘There are no prior publications on this topic,’ it is more likely that you have not found them yet and may need to broaden your search.  At another extreme, writing a complete literature review can be difficult with a well-trod topic.  Do not cite it all; instead cite what is most relevant.  If that still leaves too much to include, be sure to reference influential sources…as well as high-quality work that clearly connects to the points you make. ( Klingner, Scanlon, & Pressley, 2005 ).

7.2 Creating a summary table

Literature reviews can be organized sequentially or by topic, theme, method, results, theory, or argument.  It’s important to develop categories that are meaningful and relevant to your research question.  Take detailed notes on each article and use a consistent format for capturing all the information each article provides.  These notes and the summary table can be done manually, using note cards.  However, given the amount of information you will be recording, an electronic file created in a word processing or spreadsheet is more manageable. Examples of fields you may want to capture in your notes include:

• Authors’ names
• Article title
• Publication year
• Main purpose of the article
• Methodology or research design
• Participants
• Measurement
• Conclusions

  Other fields that will be useful when you begin to synthesize the sum total of your research:

• Specific details of the article or research that are especially relevant to your study
• Key terms and definitions
• Strengths or weaknesses in research design
• Relationships to other studies
• Possible gaps in the research or literature (for example, many research articles conclude with the statement “more research is needed in this area”)
• Finally, note how closely each article relates to your topic.  You may want to rank these as high, medium, or low relevance.  For papers that you decide not to include, you may want to note your reasoning for exclusion, such as ‘small sample size’, ‘local case study,’ or ‘lacks evidence to support assertion.’

This short video demonstrates how a nursing researcher might create a summary table.

7.2.1 Creating a Summary Table

  Summary tables can be organized by author or by theme, for example:

For a summary table template, see http://blogs.monm.edu/writingatmc/files/2013/04/Synthesis-Matrix-Template.pdf

7.3 Creating a summary outline

An alternate way to organize your articles for synthesis it to create an outline. After you have collected the articles you intend to use (and have put aside the ones you won’t be using), it’s time to identify the conclusions that can be drawn from the articles as a group.

  Based on your review of the collected articles, group them by categories.  You may wish to further organize them by topic and then chronologically or alphabetically by author.  For each topic or subtopic you identified during your critical analysis of the paper, determine what those papers have in common.  Likewise, determine which ones in the group differ.  If there are contradictory findings, you may be able to identify methodological or theoretical differences that could account for the contradiction (for example, differences in population demographics).  Determine what general conclusions you can report about the topic or subtopic as the entire group of studies relate to it.  For example, you may have several studies that agree on outcome, such as ‘hands on learning is best for science in elementary school’ or that ‘continuing education is the best method for updating nursing certification.’ In that case, you may want to organize by methodology used in the studies rather than by outcome.

Organize your outline in a logical order and prepare to write the first draft of your literature review.  That order might be from broad to more specific, or it may be sequential or chronological, going from foundational literature to more current.  Remember, “an effective literature review need not denote the entire historical record, but rather establish the raison d’etre for the current study and in doing so cite that literature distinctly pertinent for theoretical, methodological, or empirical reasons.” ( Milardo, 2015, p. 22 ).

As you organize the summarized documents into a logical structure, you are also appraising and synthesizing complex information from multiple sources.  Your literature review is the result of your research that synthesizes new and old information and creates new knowledge.

7.4 Additional resources:

Literature Reviews: Using a Matrix to Organize Research / Saint Mary’s University of Minnesota

Literature Review: Synthesizing Multiple Sources / Indiana University

Writing a Literature Review and Using a Synthesis Matrix / Florida International University

 Sample Literature Reviews Grid / Complied by Lindsay Roberts

Select three or four articles on a single topic of interest to you. Then enter them into an outline or table in the categories you feel are important to a research question. Try both the grid and the outline if you can to see which suits you better. The attached grid contains the fields suggested in the video .

Literature Review Table  

Test Yourself

• Select two articles from your own summary table or outline and write a paragraph explaining how and why the sources relate to each other and your review of the literature.
• In your literature review, under what topic or subtopic will you place the paragraph you just wrote?

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Literature Reviews for Education and Nursing Graduate Students Copyright © by Linda Frederiksen is licensed under a Creative Commons Attribution 4.0 International License , except where otherwise noted.

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Home » Research Paper – Structure, Examples and Writing Guide

Research Paper – Structure, Examples and Writing Guide

Table of Contents

Research Paper

Definition:

Research Paper is a written document that presents the author’s original research, analysis, and interpretation of a specific topic or issue.

It is typically based on Empirical Evidence, and may involve qualitative or quantitative research methods, or a combination of both. The purpose of a research paper is to contribute new knowledge or insights to a particular field of study, and to demonstrate the author’s understanding of the existing literature and theories related to the topic.

Structure of Research Paper

The structure of a research paper typically follows a standard format, consisting of several sections that convey specific information about the research study. The following is a detailed explanation of the structure of a research paper:

The title page contains the title of the paper, the name(s) of the author(s), and the affiliation(s) of the author(s). It also includes the date of submission and possibly, the name of the journal or conference where the paper is to be published.

The abstract is a brief summary of the research paper, typically ranging from 100 to 250 words. It should include the research question, the methods used, the key findings, and the implications of the results. The abstract should be written in a concise and clear manner to allow readers to quickly grasp the essence of the research.

Introduction

The introduction section of a research paper provides background information about the research problem, the research question, and the research objectives. It also outlines the significance of the research, the research gap that it aims to fill, and the approach taken to address the research question. Finally, the introduction section ends with a clear statement of the research hypothesis or research question.

Literature Review

The literature review section of a research paper provides an overview of the existing literature on the topic of study. It includes a critical analysis and synthesis of the literature, highlighting the key concepts, themes, and debates. The literature review should also demonstrate the research gap and how the current study seeks to address it.

The methods section of a research paper describes the research design, the sample selection, the data collection and analysis procedures, and the statistical methods used to analyze the data. This section should provide sufficient detail for other researchers to replicate the study.

The results section presents the findings of the research, using tables, graphs, and figures to illustrate the data. The findings should be presented in a clear and concise manner, with reference to the research question and hypothesis.

The discussion section of a research paper interprets the findings and discusses their implications for the research question, the literature review, and the field of study. It should also address the limitations of the study and suggest future research directions.

The conclusion section summarizes the main findings of the study, restates the research question and hypothesis, and provides a final reflection on the significance of the research.

The references section provides a list of all the sources cited in the paper, following a specific citation style such as APA, MLA or Chicago.

How to Write Research Paper

You can write Research Paper by the following guide:

• Choose a Topic: The first step is to select a topic that interests you and is relevant to your field of study. Brainstorm ideas and narrow down to a research question that is specific and researchable.
• Conduct a Literature Review: The literature review helps you identify the gap in the existing research and provides a basis for your research question. It also helps you to develop a theoretical framework and research hypothesis.
• Develop a Thesis Statement : The thesis statement is the main argument of your research paper. It should be clear, concise and specific to your research question.
• Plan your Research: Develop a research plan that outlines the methods, data sources, and data analysis procedures. This will help you to collect and analyze data effectively.
• Collect and Analyze Data: Collect data using various methods such as surveys, interviews, observations, or experiments. Analyze data using statistical tools or other qualitative methods.
• Organize your Paper : Organize your paper into sections such as Introduction, Literature Review, Methods, Results, Discussion, and Conclusion. Ensure that each section is coherent and follows a logical flow.
• Write your Paper : Start by writing the introduction, followed by the literature review, methods, results, discussion, and conclusion. Ensure that your writing is clear, concise, and follows the required formatting and citation styles.
• Edit and Proofread your Paper: Review your paper for grammar and spelling errors, and ensure that it is well-structured and easy to read. Ask someone else to review your paper to get feedback and suggestions for improvement.
• Cite your Sources: Ensure that you properly cite all sources used in your research paper. This is essential for giving credit to the original authors and avoiding plagiarism.

Research Paper Example

Note : The below example research paper is for illustrative purposes only and is not an actual research paper. Actual research papers may have different structures, contents, and formats depending on the field of study, research question, data collection and analysis methods, and other factors. Students should always consult with their professors or supervisors for specific guidelines and expectations for their research papers.

Research Paper Example sample for Students:

Title: The Impact of Social Media on Mental Health among Young Adults

Abstract: This study aims to investigate the impact of social media use on the mental health of young adults. A literature review was conducted to examine the existing research on the topic. A survey was then administered to 200 university students to collect data on their social media use, mental health status, and perceived impact of social media on their mental health. The results showed that social media use is positively associated with depression, anxiety, and stress. The study also found that social comparison, cyberbullying, and FOMO (Fear of Missing Out) are significant predictors of mental health problems among young adults.

Introduction: Social media has become an integral part of modern life, particularly among young adults. While social media has many benefits, including increased communication and social connectivity, it has also been associated with negative outcomes, such as addiction, cyberbullying, and mental health problems. This study aims to investigate the impact of social media use on the mental health of young adults.

Literature Review: The literature review highlights the existing research on the impact of social media use on mental health. The review shows that social media use is associated with depression, anxiety, stress, and other mental health problems. The review also identifies the factors that contribute to the negative impact of social media, including social comparison, cyberbullying, and FOMO.

Methods : A survey was administered to 200 university students to collect data on their social media use, mental health status, and perceived impact of social media on their mental health. The survey included questions on social media use, mental health status (measured using the DASS-21), and perceived impact of social media on their mental health. Data were analyzed using descriptive statistics and regression analysis.

Results : The results showed that social media use is positively associated with depression, anxiety, and stress. The study also found that social comparison, cyberbullying, and FOMO are significant predictors of mental health problems among young adults.

Discussion : The study’s findings suggest that social media use has a negative impact on the mental health of young adults. The study highlights the need for interventions that address the factors contributing to the negative impact of social media, such as social comparison, cyberbullying, and FOMO.

Conclusion : In conclusion, social media use has a significant impact on the mental health of young adults. The study’s findings underscore the need for interventions that promote healthy social media use and address the negative outcomes associated with social media use. Future research can explore the effectiveness of interventions aimed at reducing the negative impact of social media on mental health. Additionally, longitudinal studies can investigate the long-term effects of social media use on mental health.

Limitations : The study has some limitations, including the use of self-report measures and a cross-sectional design. The use of self-report measures may result in biased responses, and a cross-sectional design limits the ability to establish causality.

Implications: The study’s findings have implications for mental health professionals, educators, and policymakers. Mental health professionals can use the findings to develop interventions that address the negative impact of social media use on mental health. Educators can incorporate social media literacy into their curriculum to promote healthy social media use among young adults. Policymakers can use the findings to develop policies that protect young adults from the negative outcomes associated with social media use.

References :

• Twenge, J. M., & Campbell, W. K. (2019). Associations between screen time and lower psychological well-being among children and adolescents: Evidence from a population-based study. Preventive medicine reports, 15, 100918.
• Primack, B. A., Shensa, A., Escobar-Viera, C. G., Barrett, E. L., Sidani, J. E., Colditz, J. B., … & James, A. E. (2017). Use of multiple social media platforms and symptoms of depression and anxiety: A nationally-representative study among US young adults. Computers in Human Behavior, 69, 1-9.
• Van der Meer, T. G., & Verhoeven, J. W. (2017). Social media and its impact on academic performance of students. Journal of Information Technology Education: Research, 16, 383-398.

Appendix : The survey used in this study is provided below.

Social Media and Mental Health Survey

• How often do you use social media per day?
• Less than 30 minutes
• 30 minutes to 1 hour
• 1 to 2 hours
• 2 to 4 hours
• More than 4 hours
• Which social media platforms do you use?
• Others (Please specify)
• How often do you experience the following on social media?
• Social comparison (comparing yourself to others)
• Cyberbullying
• Fear of Missing Out (FOMO)
• Have you ever experienced any of the following mental health problems in the past month?
• Do you think social media use has a positive or negative impact on your mental health?
• Very positive
• Somewhat positive
• Somewhat negative
• Very negative
• In your opinion, which factors contribute to the negative impact of social media on mental health?
• Social comparison
• In your opinion, what interventions could be effective in reducing the negative impact of social media on mental health?
• Education on healthy social media use
• Counseling for mental health problems caused by social media
• Social media detox programs
• Regulation of social media use

Thank you for your participation!

Applications of Research Paper

Research papers have several applications in various fields, including:

• Advancing knowledge: Research papers contribute to the advancement of knowledge by generating new insights, theories, and findings that can inform future research and practice. They help to answer important questions, clarify existing knowledge, and identify areas that require further investigation.
• Informing policy: Research papers can inform policy decisions by providing evidence-based recommendations for policymakers. They can help to identify gaps in current policies, evaluate the effectiveness of interventions, and inform the development of new policies and regulations.
• Improving practice: Research papers can improve practice by providing evidence-based guidance for professionals in various fields, including medicine, education, business, and psychology. They can inform the development of best practices, guidelines, and standards of care that can improve outcomes for individuals and organizations.
• Educating students : Research papers are often used as teaching tools in universities and colleges to educate students about research methods, data analysis, and academic writing. They help students to develop critical thinking skills, research skills, and communication skills that are essential for success in many careers.
• Fostering collaboration: Research papers can foster collaboration among researchers, practitioners, and policymakers by providing a platform for sharing knowledge and ideas. They can facilitate interdisciplinary collaborations and partnerships that can lead to innovative solutions to complex problems.

When to Write Research Paper

Research papers are typically written when a person has completed a research project or when they have conducted a study and have obtained data or findings that they want to share with the academic or professional community. Research papers are usually written in academic settings, such as universities, but they can also be written in professional settings, such as research organizations, government agencies, or private companies.

Here are some common situations where a person might need to write a research paper:

• For academic purposes: Students in universities and colleges are often required to write research papers as part of their coursework, particularly in the social sciences, natural sciences, and humanities. Writing research papers helps students to develop research skills, critical thinking skills, and academic writing skills.
• For publication: Researchers often write research papers to publish their findings in academic journals or to present their work at academic conferences. Publishing research papers is an important way to disseminate research findings to the academic community and to establish oneself as an expert in a particular field.
• To inform policy or practice : Researchers may write research papers to inform policy decisions or to improve practice in various fields. Research findings can be used to inform the development of policies, guidelines, and best practices that can improve outcomes for individuals and organizations.
• To share new insights or ideas: Researchers may write research papers to share new insights or ideas with the academic or professional community. They may present new theories, propose new research methods, or challenge existing paradigms in their field.

Purpose of Research Paper

The purpose of a research paper is to present the results of a study or investigation in a clear, concise, and structured manner. Research papers are written to communicate new knowledge, ideas, or findings to a specific audience, such as researchers, scholars, practitioners, or policymakers. The primary purposes of a research paper are:

• To contribute to the body of knowledge : Research papers aim to add new knowledge or insights to a particular field or discipline. They do this by reporting the results of empirical studies, reviewing and synthesizing existing literature, proposing new theories, or providing new perspectives on a topic.
• To inform or persuade: Research papers are written to inform or persuade the reader about a particular issue, topic, or phenomenon. They present evidence and arguments to support their claims and seek to persuade the reader of the validity of their findings or recommendations.
• To advance the field: Research papers seek to advance the field or discipline by identifying gaps in knowledge, proposing new research questions or approaches, or challenging existing assumptions or paradigms. They aim to contribute to ongoing debates and discussions within a field and to stimulate further research and inquiry.
• To demonstrate research skills: Research papers demonstrate the author’s research skills, including their ability to design and conduct a study, collect and analyze data, and interpret and communicate findings. They also demonstrate the author’s ability to critically evaluate existing literature, synthesize information from multiple sources, and write in a clear and structured manner.

Characteristics of Research Paper

Research papers have several characteristics that distinguish them from other forms of academic or professional writing. Here are some common characteristics of research papers:

• Evidence-based: Research papers are based on empirical evidence, which is collected through rigorous research methods such as experiments, surveys, observations, or interviews. They rely on objective data and facts to support their claims and conclusions.
• Structured and organized: Research papers have a clear and logical structure, with sections such as introduction, literature review, methods, results, discussion, and conclusion. They are organized in a way that helps the reader to follow the argument and understand the findings.
• Formal and objective: Research papers are written in a formal and objective tone, with an emphasis on clarity, precision, and accuracy. They avoid subjective language or personal opinions and instead rely on objective data and analysis to support their arguments.
• Citations and references: Research papers include citations and references to acknowledge the sources of information and ideas used in the paper. They use a specific citation style, such as APA, MLA, or Chicago, to ensure consistency and accuracy.
• Peer-reviewed: Research papers are often peer-reviewed, which means they are evaluated by other experts in the field before they are published. Peer-review ensures that the research is of high quality, meets ethical standards, and contributes to the advancement of knowledge in the field.
• Objective and unbiased: Research papers strive to be objective and unbiased in their presentation of the findings. They avoid personal biases or preconceptions and instead rely on the data and analysis to draw conclusions.

Advantages of Research Paper

Research papers have many advantages, both for the individual researcher and for the broader academic and professional community. Here are some advantages of research papers:

• Contribution to knowledge: Research papers contribute to the body of knowledge in a particular field or discipline. They add new information, insights, and perspectives to existing literature and help advance the understanding of a particular phenomenon or issue.
• Opportunity for intellectual growth: Research papers provide an opportunity for intellectual growth for the researcher. They require critical thinking, problem-solving, and creativity, which can help develop the researcher’s skills and knowledge.
• Career advancement: Research papers can help advance the researcher’s career by demonstrating their expertise and contributions to the field. They can also lead to new research opportunities, collaborations, and funding.
• Academic recognition: Research papers can lead to academic recognition in the form of awards, grants, or invitations to speak at conferences or events. They can also contribute to the researcher’s reputation and standing in the field.
• Impact on policy and practice: Research papers can have a significant impact on policy and practice. They can inform policy decisions, guide practice, and lead to changes in laws, regulations, or procedures.
• Advancement of society: Research papers can contribute to the advancement of society by addressing important issues, identifying solutions to problems, and promoting social justice and equality.

Limitations of Research Paper

Research papers also have some limitations that should be considered when interpreting their findings or implications. Here are some common limitations of research papers:

• Limited generalizability: Research findings may not be generalizable to other populations, settings, or contexts. Studies often use specific samples or conditions that may not reflect the broader population or real-world situations.
• Potential for bias : Research papers may be biased due to factors such as sample selection, measurement errors, or researcher biases. It is important to evaluate the quality of the research design and methods used to ensure that the findings are valid and reliable.
• Ethical concerns: Research papers may raise ethical concerns, such as the use of vulnerable populations or invasive procedures. Researchers must adhere to ethical guidelines and obtain informed consent from participants to ensure that the research is conducted in a responsible and respectful manner.
• Limitations of methodology: Research papers may be limited by the methodology used to collect and analyze data. For example, certain research methods may not capture the complexity or nuance of a particular phenomenon, or may not be appropriate for certain research questions.
• Publication bias: Research papers may be subject to publication bias, where positive or significant findings are more likely to be published than negative or non-significant findings. This can skew the overall findings of a particular area of research.
• Time and resource constraints: Research papers may be limited by time and resource constraints, which can affect the quality and scope of the research. Researchers may not have access to certain data or resources, or may be unable to conduct long-term studies due to practical limitations.

About the author

Muhammad Hassan

Researcher, Academic Writer, Web developer

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Literature Reviews for Medical Sciences

• Introduction
• Headings and subheadings
• Organization

This is the most important part of your paper AND the largest.  It should be structured as follows:

• Do not begin on a new page (begin where the Introduction ends)
• Start with Level 1 Headings* before moving down to Level 2 and 3
• All paragraphs should start on a new line
• Use the guidelines in Headings and Subheadings to guide you on indentation

*For more information on Level 1 headings see the tab Headings and Subheadings . 

The main focus of the body portion of your literature review is to:

• Explore main arguments using evidence from the texts
• Add analysis and insight to evidence from the literature
• Compare and contrast your sources
• Critically evaluate (What makes your sources strong? What makes them weak? How do they compare to other sources you have found?)

You can organize your literature in one of three different ways:

• Chronological : tracking the development of your topic over a certain period of time (good for: analyzing turning points, exploring change or developments over time)
• Thematic : organize according to recurring themes across the literature (good for: comparing and contrasting, highlighting patterns)
• Methodological : arrange according to the methodologies used in your sources (good for: comparing different research and discipline methods, dividing into sociological, historical, or cultural sources, looking at how the research was conducted instead of the results)

For more information on organizational structures, visit this Link from Purdue OWL. 

When writing the body section of your literature review, remember PASE:

PRESENT  your evidence (quotes, citations, examples from the text)

ANALYZE  your findings (Why is this important? What does it mean?)

SYNTHESIZE  your examples (compare/contrast to your other sources)

EVALUATE  your sources (What makes it strong? What are its weaknesses?)

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University Library

How to Read a Scientific Paper: Structure of an Article

• Structure of an Article
• Online Tutorials

STOP:  Reading a scientific article is not like reading a book, trying to plow right through is often overwhelming. Some of the research might be new to you or beyond your level of expertise. However, reading scientific articles is good practice to learn how to identify the important points and conclusions made by the authors and critically evaluate those ideas as well.

INSTEAD : Articles are meant to be skimmed and perused first. For example: look at the abstract, see if it interests you, jump to the discussion and conclusions, what did the authors learn? Do you want to know more then pop back to the methods and see how they did it or look at the results and see if the discussion accurately captures the findings. 

The Abstract of an article is a short summary of the article's contents. Often it includes the focus, results, and conclusions of the study. Since the abstract does not contain all the information found in the article, it's best to view it as a tool for deciding if you should investigate the article further. An article's abstract will always be freely available to view. 

Questions to ask while reading the abstract :

• Does this interest me?
• Is this related to my area of research?

Introduction and Literature Review

The Introduction of an article explains the idea being investigated, and gives background information if necessary. The introduction should also indicate why the study done in this particular article is unique, or how it adds to the overall discussion. The latter part of the introduction will also contain a literature review, this is a brief summary of related research that occurred before this article was written and that this article seeks to expand on.

Questions to ask while reading the introduction :

• What is the author's goal in writing this article?
• What area is the article building on?
• How is this research unique?
• Will this article tell me anything new?

Materials and Methods

The Materials and Methods of an article tells you how the study was performed. It should include the specific steps of the experiment or study, so as to be repeatable. 

Questions to ask while reading materials and methods : 

• Is all the information present in order to repeat the experiment or study carried out?
• Are the steps the authors took clearly explained?

The Results of an article should give an unbiased account of what the study's findings were, with data included. 

Sometimes the Results and Discussion section (described next) are combined.

Questions to ask while reading the results:

• Are the results presented in a factual and unbiased way?
• Is data provided to complement the findings?
• Is the data clear and understandable?

The Discussion of an article tells you what the researchers felt was significant about the results. This section contains an analysis of the data, and may point to facts and figures.

Questions to ask while reading the discussion:  

• Is the argument made by the authors supported by the data present in the results?
• After reading the discussion do you find that more data should have been provided in the results?
• Are there weaknesses in their argument?

The Conclusion of an article gives you the final thoughts of the researchers. It may reiterate what they noted in the discussion, or may be combined with the discussion. It may provide limitations present in the study or give recommendations for further research. This is the chance for the authors to clearly and succinctly state the ultimate finding or purpose of the article.

Questions to ask while reading the conclusion:

• Is the conclusion valid?
• Based on what you have read, what other research should be explored next?

The References of an article lists the works used in the research and writing of the article. Any articles mentioned in the introduction should be present here, as should any studies that were modeled in the materials and methods.

Question to ask while reviewing the references:

• What other articles should I read?
• What other authors are respected in this field?
• What journals are frequently cited in this area?

Suggested Further Reading

Dean, R. (2013). How to read a paper and appraise the evidence . In Practice , 35(5) , 282-285.

Pain, Elisabeth. “ How to (Seriously) Read a Scientific Paper .” Science , 21 Mar. 2016.

Ruben, Adam. “ How to Read a Scientific Paper .” Science , 20 Jan. 2016.

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Read a scholarly article

• Introduction
• Types of Scholarly Articles
• Interactive Article Diagram
• Reading for different purposes

The Structure of Scholarly Articles

Understanding the structure of scholarly articles is probably the most important part of understanding the article. The following structure is used in most scholarly articles, with the exception of (a) articles which are  entirely  literature reviews and (b) humanities articles. 

These sections may not always be labeled this way, and sometimes multiple sections will be merged into one (like the introduction & literature review). 

Article sections in the order in which they appear

• Literature Review (sometimes not labeled)
• Methodology
• Discussion / Conclusion

Article sections in order of importance

You should always read..., the abstract.

The abstract is usually a one-paragraph summary of the article. If the article doesn't seem useful after reading the abstract, don't read any further.

The Introduction & Literature Review

The introduction and literature review will help you understand:

• What the authors are writing about (their research questions )
• Why the authors are writing about this topic
• What others have written on this topic

The Discussion & Conclusion

The discussion and conclusion are at the end (just before the reference list). If the authors conducted an experiment, these sections should provide a summary of what the authors found, how their findings fit into the larger conversation about the topic, and what they believe should be researched in the future.

You may not need to read...

Methodology & results.

Do you need to read the methodology & results sections? It depends on your purpose for reading the article. You may want to read these sections if:

You're using the article as a source in a research paper *

If you're a first or second year student, or the research paper is on a topic unrelated to your major , you may want to skip over these sections. These sections are the most difficult to understand unless you have a high level of expertise in both the topic and research in your discipline.

If you're a junior, a senior, or a graduate student, and the article is in your discipline, then you most likely have the level of expertise necessary to understand most of these sections.

You're conducting your own research project *

You may be required to read this section in a particular class.

If you're not sure whether you should read these sections, ask your professor.

* Research has two meanings:

• Doing a thorough investigation of a topic (this would include things like searching Google, doing library research, etc.). When we say "research paper", we're referring to this kind of research.
• Trying to answer a specific question through experimentation and analysis. When we say "research project", we're referring to this kind of research.

The methodology section:

• Explains how the authors intend to answer their research questions
• What kind of data they are going to collect, and from who (or what)
• How they are going to (or how they did) collect that data

The results section usually involves analysis of the data collected.

• Search Google or Wikipedia for unfamiliar terms or concepts
• Ask your professor for help with other questions

Here's a real-life example:

• Researchers wanted to know whether pet ownership and/or medication had the best effects on high blood pressure caused by stress.
• They tested this by having some participants adopt a pet and take a medication, while others just took medication.
• The data they collected included blood pressure readings.
• They analyzed this data using statistical methods.

Source : Allen, K., Shykoff, B. E., & Izzo Jr, J. L. (2001). Pet ownership, but not ACE inhibitor therapy, blunts home blood pressure responses to mental stress. Hypertension, 38 (4), 815-820.

Other Important Sections to Review

These parts of a scholarly article probably won't contribute to your understanding of the article, but they're helpful in other ways:

References / Bibliographies

If you've read the introduction and literature review, you may have come across some sources that might be useful for your topic. All their sources should be at the end of the article or in footnotes! Check out our guide on finding sources using bibliographies .

Citation information

Many articles have the journal title, volume and issue numbers, and page numbers listed right on the article. This information is usually at the top of the first page of the article.

Author credentials

Author credentials are usually listed on the first page of the article, underneath the authors' names, or listed as footnotes. These credentials usually indicate where the authors work. This should help if you want to contact the authors with questions!

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• Knowledge Base

Methodology

• Systematic Review | Definition, Example, & Guide

Systematic Review | Definition, Example & Guide

Published on June 15, 2022 by Shaun Turney . Revised on November 20, 2023.

A systematic review is a type of review that uses repeatable methods to find, select, and synthesize all available evidence. It answers a clearly formulated research question and explicitly states the methods used to arrive at the answer.

They answered the question “What is the effectiveness of probiotics in reducing eczema symptoms and improving quality of life in patients with eczema?”

In this context, a probiotic is a health product that contains live microorganisms and is taken by mouth. Eczema is a common skin condition that causes red, itchy skin.

Table of contents

What is a systematic review, systematic review vs. meta-analysis, systematic review vs. literature review, systematic review vs. scoping review, when to conduct a systematic review, pros and cons of systematic reviews, step-by-step example of a systematic review, other interesting articles, frequently asked questions about systematic reviews.

A review is an overview of the research that’s already been completed on a topic.

What makes a systematic review different from other types of reviews is that the research methods are designed to reduce bias . The methods are repeatable, and the approach is formal and systematic:

• Formulate a research question
• Develop a protocol
• Search for all relevant studies
• Apply the selection criteria
• Extract the data
• Synthesize the data
• Write and publish a report

Although multiple sets of guidelines exist, the Cochrane Handbook for Systematic Reviews is among the most widely used. It provides detailed guidelines on how to complete each step of the systematic review process.

Systematic reviews are most commonly used in medical and public health research, but they can also be found in other disciplines.

Systematic reviews typically answer their research question by synthesizing all available evidence and evaluating the quality of the evidence. Synthesizing means bringing together different information to tell a single, cohesive story. The synthesis can be narrative ( qualitative ), quantitative , or both.

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Systematic reviews often quantitatively synthesize the evidence using a meta-analysis . A meta-analysis is a statistical analysis, not a type of review.

A meta-analysis is a technique to synthesize results from multiple studies. It’s a statistical analysis that combines the results of two or more studies, usually to estimate an effect size .

A literature review is a type of review that uses a less systematic and formal approach than a systematic review. Typically, an expert in a topic will qualitatively summarize and evaluate previous work, without using a formal, explicit method.

Although literature reviews are often less time-consuming and can be insightful or helpful, they have a higher risk of bias and are less transparent than systematic reviews.

Similar to a systematic review, a scoping review is a type of review that tries to minimize bias by using transparent and repeatable methods.

However, a scoping review isn’t a type of systematic review. The most important difference is the goal: rather than answering a specific question, a scoping review explores a topic. The researcher tries to identify the main concepts, theories, and evidence, as well as gaps in the current research.

Sometimes scoping reviews are an exploratory preparation step for a systematic review, and sometimes they are a standalone project.

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A systematic review is a good choice of review if you want to answer a question about the effectiveness of an intervention , such as a medical treatment.

To conduct a systematic review, you’ll need the following:

• A precise question , usually about the effectiveness of an intervention. The question needs to be about a topic that’s previously been studied by multiple researchers. If there’s no previous research, there’s nothing to review.
• If you’re doing a systematic review on your own (e.g., for a research paper or thesis ), you should take appropriate measures to ensure the validity and reliability of your research.
• Access to databases and journal archives. Often, your educational institution provides you with access.
• Time. A professional systematic review is a time-consuming process: it will take the lead author about six months of full-time work. If you’re a student, you should narrow the scope of your systematic review and stick to a tight schedule.
• Bibliographic, word-processing, spreadsheet, and statistical software . For example, you could use EndNote, Microsoft Word, Excel, and SPSS.

A systematic review has many pros .

• They minimize research bias by considering all available evidence and evaluating each study for bias.
• Their methods are transparent , so they can be scrutinized by others.
• They’re thorough : they summarize all available evidence.
• They can be replicated and updated by others.

Systematic reviews also have a few cons .

• They’re time-consuming .
• They’re narrow in scope : they only answer the precise research question.

The 7 steps for conducting a systematic review are explained with an example.

Step 1: Formulate a research question

Formulating the research question is probably the most important step of a systematic review. A clear research question will:

• Allow you to more effectively communicate your research to other researchers and practitioners
• Guide your decisions as you plan and conduct your systematic review

A good research question for a systematic review has four components, which you can remember with the acronym PICO :

• Population(s) or problem(s)
• Intervention(s)
• Comparison(s)

You can rearrange these four components to write your research question:

• What is the effectiveness of I versus C for O in P ?

Sometimes, you may want to include a fifth component, the type of study design . In this case, the acronym is PICOT .

• Type of study design(s)
• The population of patients with eczema
• The intervention of probiotics
• In comparison to no treatment, placebo , or non-probiotic treatment
• The outcome of changes in participant-, parent-, and doctor-rated symptoms of eczema and quality of life
• Randomized control trials, a type of study design

Their research question was:

• What is the effectiveness of probiotics versus no treatment, a placebo, or a non-probiotic treatment for reducing eczema symptoms and improving quality of life in patients with eczema?

Step 2: Develop a protocol

A protocol is a document that contains your research plan for the systematic review. This is an important step because having a plan allows you to work more efficiently and reduces bias.

Your protocol should include the following components:

• Background information : Provide the context of the research question, including why it’s important.
• Research objective (s) : Rephrase your research question as an objective.
• Selection criteria: State how you’ll decide which studies to include or exclude from your review.
• Search strategy: Discuss your plan for finding studies.
• Analysis: Explain what information you’ll collect from the studies and how you’ll synthesize the data.

If you’re a professional seeking to publish your review, it’s a good idea to bring together an advisory committee . This is a group of about six people who have experience in the topic you’re researching. They can help you make decisions about your protocol.

It’s highly recommended to register your protocol. Registering your protocol means submitting it to a database such as PROSPERO or ClinicalTrials.gov .

Step 3: Search for all relevant studies

Searching for relevant studies is the most time-consuming step of a systematic review.

To reduce bias, it’s important to search for relevant studies very thoroughly. Your strategy will depend on your field and your research question, but sources generally fall into these four categories:

• Databases: Search multiple databases of peer-reviewed literature, such as PubMed or Scopus . Think carefully about how to phrase your search terms and include multiple synonyms of each word. Use Boolean operators if relevant.
• Handsearching: In addition to searching the primary sources using databases, you’ll also need to search manually. One strategy is to scan relevant journals or conference proceedings. Another strategy is to scan the reference lists of relevant studies.
• Gray literature: Gray literature includes documents produced by governments, universities, and other institutions that aren’t published by traditional publishers. Graduate student theses are an important type of gray literature, which you can search using the Networked Digital Library of Theses and Dissertations (NDLTD) . In medicine, clinical trial registries are another important type of gray literature.
• Experts: Contact experts in the field to ask if they have unpublished studies that should be included in your review.

At this stage of your review, you won’t read the articles yet. Simply save any potentially relevant citations using bibliographic software, such as Scribbr’s APA or MLA Generator .

• Databases: EMBASE, PsycINFO, AMED, LILACS, and ISI Web of Science
• Handsearch: Conference proceedings and reference lists of articles
• Gray literature: The Cochrane Library, the metaRegister of Controlled Trials, and the Ongoing Skin Trials Register
• Experts: Authors of unpublished registered trials, pharmaceutical companies, and manufacturers of probiotics

Step 4: Apply the selection criteria

Applying the selection criteria is a three-person job. Two of you will independently read the studies and decide which to include in your review based on the selection criteria you established in your protocol . The third person’s job is to break any ties.

To increase inter-rater reliability , ensure that everyone thoroughly understands the selection criteria before you begin.

If you’re writing a systematic review as a student for an assignment, you might not have a team. In this case, you’ll have to apply the selection criteria on your own; you can mention this as a limitation in your paper’s discussion.

You should apply the selection criteria in two phases:

• Based on the titles and abstracts : Decide whether each article potentially meets the selection criteria based on the information provided in the abstracts.
• Based on the full texts: Download the articles that weren’t excluded during the first phase. If an article isn’t available online or through your library, you may need to contact the authors to ask for a copy. Read the articles and decide which articles meet the selection criteria.

It’s very important to keep a meticulous record of why you included or excluded each article. When the selection process is complete, you can summarize what you did using a PRISMA flow diagram .

Next, Boyle and colleagues found the full texts for each of the remaining studies. Boyle and Tang read through the articles to decide if any more studies needed to be excluded based on the selection criteria.

When Boyle and Tang disagreed about whether a study should be excluded, they discussed it with Varigos until the three researchers came to an agreement.

Step 5: Extract the data

Extracting the data means collecting information from the selected studies in a systematic way. There are two types of information you need to collect from each study:

• Information about the study’s methods and results . The exact information will depend on your research question, but it might include the year, study design , sample size, context, research findings , and conclusions. If any data are missing, you’ll need to contact the study’s authors.
• Your judgment of the quality of the evidence, including risk of bias .

You should collect this information using forms. You can find sample forms in The Registry of Methods and Tools for Evidence-Informed Decision Making and the Grading of Recommendations, Assessment, Development and Evaluations Working Group .

Extracting the data is also a three-person job. Two people should do this step independently, and the third person will resolve any disagreements.

They also collected data about possible sources of bias, such as how the study participants were randomized into the control and treatment groups.

Step 6: Synthesize the data

Synthesizing the data means bringing together the information you collected into a single, cohesive story. There are two main approaches to synthesizing the data:

• Narrative ( qualitative ): Summarize the information in words. You’ll need to discuss the studies and assess their overall quality.
• Quantitative : Use statistical methods to summarize and compare data from different studies. The most common quantitative approach is a meta-analysis , which allows you to combine results from multiple studies into a summary result.

Generally, you should use both approaches together whenever possible. If you don’t have enough data, or the data from different studies aren’t comparable, then you can take just a narrative approach. However, you should justify why a quantitative approach wasn’t possible.

Boyle and colleagues also divided the studies into subgroups, such as studies about babies, children, and adults, and analyzed the effect sizes within each group.

Step 7: Write and publish a report

The purpose of writing a systematic review article is to share the answer to your research question and explain how you arrived at this answer.

Your article should include the following sections:

• Abstract : A summary of the review
• Introduction : Including the rationale and objectives
• Methods : Including the selection criteria, search method, data extraction method, and synthesis method
• Results : Including results of the search and selection process, study characteristics, risk of bias in the studies, and synthesis results
• Discussion : Including interpretation of the results and limitations of the review
• Conclusion : The answer to your research question and implications for practice, policy, or research

To verify that your report includes everything it needs, you can use the PRISMA checklist .

Once your report is written, you can publish it in a systematic review database, such as the Cochrane Database of Systematic Reviews , and/or in a peer-reviewed journal.

In their report, Boyle and colleagues concluded that probiotics cannot be recommended for reducing eczema symptoms or improving quality of life in patients with eczema. Note Generative AI tools like ChatGPT can be useful at various stages of the writing and research process and can help you to write your systematic review. However, we strongly advise against trying to pass AI-generated text off as your own work.

If you want to know more about statistics , methodology , or research bias , make sure to check out some of our other articles with explanations and examples.

• Student’s  t -distribution
• Normal distribution
• Null and Alternative Hypotheses
• Chi square tests
• Confidence interval
• Quartiles & Quantiles
• Cluster sampling
• Stratified sampling
• Data cleansing
• Reproducibility vs Replicability
• Peer review
• Prospective cohort study

Research bias

• Implicit bias
• Cognitive bias
• Placebo effect
• Hawthorne effect
• Hindsight bias
• Affect heuristic
• Social desirability bias

A literature review is a survey of scholarly sources (such as books, journal articles, and theses) related to a specific topic or research question .

It is often written as part of a thesis, dissertation , or research paper , in order to situate your work in relation to existing knowledge.

A literature review is a survey of credible sources on a topic, often used in dissertations , theses, and research papers . Literature reviews give an overview of knowledge on a subject, helping you identify relevant theories and methods, as well as gaps in existing research. Literature reviews are set up similarly to other  academic texts , with an introduction , a main body, and a conclusion .

An  annotated bibliography is a list of  source references that has a short description (called an annotation ) for each of the sources. It is often assigned as part of the research process for a  paper .  

A systematic review is secondary research because it uses existing research. You don’t collect new data yourself.

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A common structure for factors that enhance synergy in contractor project teams: executive and practitioner perspectives.

1. Introduction

2. literature review and hypothesized model, 2.1. theoretical foundation, 2.2. factors related to synergy building, 2.3. executive and practitioner roles in construction projects, 2.4. hypothesized model.

• Planning and policy: This is measured by defining project goals and objectives, defining the scope and constraints of project tasks, ensuring strategic alignment of project team members, and using technology in project implementation;
• Organizational structure: This is measured by the expertise and competence of project team members, project team selection and development, resource allocation for projects, and corporate culture;
• Leadership: This is measured by leader capabilities and potential, roles and duties of leaders, leader authority, and decision-making process and change management.
• Motivation: This is measured by payment and rewards, acceptance and satisfaction, welfare and quality of life at work, relationships and conflict reduction, and team member participation;
• Coordination: This is measured by communication, data recording and document management, contract performance, and meetings and preparing reports.

3. Methodology

3.1. questionnaire survey and sample characteristics, 3.2. questionnaire establishment.

• In the questionnaire’s first section, information about the respondent’s individual and organizational details was collected, including position, duration in position, type of construction projects completed, and the average annual project volume range;
• In the questionnaire’s second section, 21 synergy factors grouped into planning and policy, organizational structure, leadership, motivation, and coordination were measured, as depicted in Figure 1 . This measurement used a five-point Likert scale, with 1 denoting extremely low importance, 5 denoting extremely high importance, and 3 denoting a medium level of importance. The questionnaire items in this section were arranged according to the model proposed in Figure 1 . The definition of synergy factors was established by reviewing the literature and theory related to synergy, collaboration, coordination, and CSFs, validating these factors’ meanings.

3.3. Questionnaire Evaluation

• Before distributing the questionnaire, in-depth interviews were conducted with three experts in construction projects, each with over 15 years of experience, to test its content validity. The feedback from these experts was compared with the existing literature and theory, and adjustments were made to ensure that the questionnaire was clear and concise. Additionally, Spearman’s rank correlation was used to evaluate the construct validity of the synergy factors in the questionnaire. The study found that all of the synergy factors were correlated, confirming the construct validity of the questionnaire items [ 23 ];
• In the reliability test, the internal consistency of the questionnaire scale was assessed using Cronbach’s alpha. The alpha value ranges from 0 to 1, where 0 signifies the lowest reliability and 1 signifies the highest reliability. The test for the questionnaire scale yielded values of 0.918 and 0.934 for executives and practitioners, respectively. According to Tavakol and Dennick [ 24 ], an acceptable Cronbach’s alpha value is above 0.7; thus, the alpha value of the questionnaire scale demonstrated satisfactory reliability.

3.4. Data Analysis Methods

• Comparing the mean importance and rank order of synergy factors: When analyzing synergy factors, valuable insights can be gained into the relative significance of different factors (also known as variables) contributing to overall synergy. This can help stakeholders prioritize their focus on key elements that enhance synergy. By comparing the mean importance and rank order of synergy factors, executives and practitioners can identify areas for further investigation in the hypothesized model, leading to a more comprehensive understanding of the important factors driving synergy. The comparison methods involve (1) calculating the mean importance for each synergy factor based on sample responses, (2) ranking them to identify the most important factors, and (3) discussing why some of the factors are crucial for enhancing synergy among the contractor project team;
• Examining differences and similarities in synergy factors between executive and practitioner perspectives: A non-parametric statistical tool called the Mann–Whitney U test was used to examine the mean importance of synergy factors for executives and practitioners by setting the null hypothesis (Ho): there is no difference in the mean importance of synergy factors between the two sample groups. This examination is widely applied in various fields like social sciences, economics, and engineering owing to its versatility and robustness in analyzing non-normally distributed data. The U statistic in this test is used to determine the p -value, which assesses the significance of the difference between the two sample groups. If the p -value is lower than 0.05 (significance level), Ho is rejected, suggesting that the mean importance of synergy factors derived from executives and practitioners differs;
• Identifying a common structure for synergy factors: To analyze the hypothesized model in Figure 1 , confirmatory factor analysis (CFA) was performed. CFA is a statistical technique used to validate the hypothesized relationships between observed and latent variables. CFA examines how well the observed data align with the expected relationship specified in the conceptual model ( Figure 1 ). By analyzing the data collected through CFA, insights can be gained into the underlying structure of factors (also known as variables). Researchers use methods like five-point Likert scales to directly measure observed variables as they indirectly measure and determine the latent variables that influence the hypothesized observed variables. There are two types of latent variables: exogenous variables, which influence other latent variables, and endogenous variables, which are influenced by other latent variables (either endogenous or exogenous ones). The CFA models for exogenous and endogenous latent variables can be represented by Equations (1) and (2), respectively [ 25 ].
• Chi-square (χ 2 ): This criterion finds a model that fits the sample data well. When the chi-square value is zero, the sample data best fit the model. For ease of use, this criterion is indicated by the p -value. The p -value is in the 0.05–1.00 range, indicating a good fit for the model [ 26 ];
• Relative chi-square (χ 2 / df ): The smallest difference divided by the number of its degrees of freedom [ 27 ];
• Incremental fit index (IFI): Also termed comparative or relative fit indices, these measures do not employ chi-square in its original form but instead compare the chi-square value to a baseline model [ 28 ];
• Tucker–Lewis index (TLI): The TLI is an incremental fit index that can compare a hypothesized model against a null model [ 29 ]. It ranges between 0 (no fit) and 1 (best fit), and a value above 0.90 is considered a good model fit;
• Comparative fit index (CFI): The CFI measures the relative improvement in the fit of the hypothesized model compared with that of the independent model [ 26 ]. An acceptable CFI range lies between 0.90 and 1.00 [ 26 ];
• Root mean square residual (RMR): The root mean square of the differences between the sample variances and covariances and their estimated values, assuming the model is accurate [ 27 ];
• Root mean square error of approximation (RMSEA): The RMSEA represents a badness-of-fit model. An RMSEA value of zero indicates the best model fit. An RMSEA value range between 0.05 and 0.08 indicates a close fit [ 29 ].

4.1. Sample Characteristics

4.2. comparing the mean importance and rank order of synergy factors, 4.3. examining differences and similarities in synergy factors between executive and practitioner perspectives, 4.4. confirmatory factor analysis, 5. discussion, 5.1. findings, 5.2. implications for the thai construction industry.

• Our examination of differences and similarities in synergy factors revealed that both executives and practitioners have similar perceptions of these factors. This discovery gives construction project participants confidence that there will be less conflict between both parties when the five-factor groups (coordination, organizational structure, motivation, leadership, and planning and policy) are implemented;
• Understanding the rank order of synergy factor groups can help executives and practitioners prioritize common measures to effectively allocate the organization’s available resources. This can also help select appropriate strategies to enhance synergy within the construction project team, potentially leading to better project performance. For instance, coordination is ranked first in enhancing synergy within a project team. Both executives and practitioners should determine measures and strategies for communication using new technologies such as ICT tools, for example, Microsoft Teams, Google Meet, or Zoom, along with digital tools like project management software (PMS) and BIM. These tools are crucial for enhancing communication and fostering coordination, especially in the construction industry, where project teams are often geographically dispersed. ICT tools also facilitate real-time information sharing and interaction, which is crucial for effective communication in such settings.

6. Conclusions

Author contributions, data availability statement, acknowledgments, conflicts of interest.

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Pongpeng, J.; Ratanawimol, N. A Common Structure for Factors that Enhance Synergy in Contractor Project Teams: Executive and Practitioner Perspectives. Buildings 2024 , 14 , 2754. https://doi.org/10.3390/buildings14092754

Pongpeng J, Ratanawimol N. A Common Structure for Factors that Enhance Synergy in Contractor Project Teams: Executive and Practitioner Perspectives. Buildings . 2024; 14(9):2754. https://doi.org/10.3390/buildings14092754

Pongpeng, Jakrapong, and Nareerat Ratanawimol. 2024. "A Common Structure for Factors that Enhance Synergy in Contractor Project Teams: Executive and Practitioner Perspectives" Buildings 14, no. 9: 2754. https://doi.org/10.3390/buildings14092754

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