formatting literature review apa

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Literature Review

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• Literature Review via APA Style.org

"a narrative summary and evaluation of the findings or theories within a literature base.  Also known as 'narrative literature review'. "

• Key takeaways from the Psi Chi webinar So You Need to Write a Literature Review via APA Style.org

Examples of Literature Reviews

• Financial socialization: A decade in review (2021)
• The impact of the COVID-19 pandemic on the development of anxiety disorders - a literature review (2021)
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How to Write a Literature Review: Writing a Literature Review in APA Format

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Writing a Literature Review in APA

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• Steps in Conducting a Literature Review

What is a literature review?

A literature review is an integrated analysis -- not just a summary-- of scholarly writings and other relevant evidence related directly to your research question.  That is, it represents a synthesis of the evidence that provides background information on your topic and shows a association between the evidence and your research question.

A literature review may be a stand alone work or the introduction to a larger research paper, depending on the assignment.  Rely heavily on the guidelines your instructor has given you.

Why is it important?

A literature review is important because it:

• Explains the background of research on a topic.
• Demonstrates why a topic is significant to a subject area.
• Discovers relationships between research studies/ideas.
• Identifies major themes, concepts, and researchers on a topic.
• Identifies critical gaps and points of disagreement.
• Discusses further research questions that logically come out of the previous studies.

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APA Style Blog - for those harder to find answers

1. Choose a topic. Define your research question.

Your literature review should be guided by your central research question.  The literature represents background and research developments related to a specific research question, interpreted and analyzed by you in a synthesized way.

• Make sure your research question is not too broad or too narrow.  Is it manageable?
• Begin writing down terms that are related to your question. These will be useful for searches later.
• If you have the opportunity, discuss your topic with your professor and your class mates.

2. Decide on the scope of your review

How many studies do you need to look at? How comprehensive should it be? How many years should it cover? 

• This may depend on your assignment.  How many sources does the assignment require?

3. Select the databases you will use to conduct your searches.

Make a list of the databases you will search. 

Where to find databases:

• use the tabs on this guide
• Find other databases in the Nursing Information Resources web page
• More on the Medical Library web page
• ... and more on the Yale University Library web page

4. Conduct your searches to find the evidence. Keep track of your searches.

• Use the key words in your question, as well as synonyms for those words, as terms in your search. Use the database tutorials for help.
• Save the searches in the databases. This saves time when you want to redo, or modify, the searches. It is also helpful to use as a guide is the searches are not finding any useful results.
• Review the abstracts of research studies carefully. This will save you time.
• Use the bibliographies and references of research studies you find to locate others.
• Check with your professor, or a subject expert in the field, if you are missing any key works in the field.
• Ask your librarian for help at any time.
• Use a citation manager, such as EndNote as the repository for your citations. See the EndNote tutorials for help.

Review the literature

Some questions to help you analyze the research:

• What was the research question of the study you are reviewing? What were the authors trying to discover?
• Was the research funded by a source that could influence the findings?
• What were the research methodologies? Analyze its literature review, the samples and variables used, the results, and the conclusions.
• Does the research seem to be complete? Could it have been conducted more soundly? What further questions does it raise?
• If there are conflicting studies, why do you think that is?
• How are the authors viewed in the field? Has this study been cited? If so, how has it been analyzed?

Tips: 

• Review the abstracts carefully.  
• Keep careful notes so that you may track your thought processes during the research process.
• Create a matrix of the studies for easy analysis, and synthesis, across all of the studies.
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Literature Review: Conducting & Writing

• Sample Literature Reviews
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• Finding "The Literature"
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Sample Lit Reviews from Communication Arts

Have an exemplary literature review.

• Literature Review Sample 1
• Literature Review Sample 2
• Literature Review Sample 3

Have you written a stellar literature review you care to share for teaching purposes?

Are you an instructor who has received an exemplary literature review and have permission from the student to post?

Please contact Britt McGowan at [email protected] for inclusion in this guide. All disciplines welcome and encouraged.

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Types of APA Papers

Welcome to the Purdue OWL

This page is brought to you by the OWL at Purdue University. When printing this page, you must include the entire legal notice.

Copyright ©1995-2018 by The Writing Lab & The OWL at Purdue and Purdue University. All rights reserved. This material may not be published, reproduced, broadcast, rewritten, or redistributed without permission. Use of this site constitutes acceptance of our terms and conditions of fair use.

Note:  This page reflects the latest version of the APA Publication Manual (i.e., APA 7), which released in October 2019. The equivalent resource for the older APA 6 style  can be found here .

There are two common types of papers written in fields using APA Style: the literature review and the experimental report. Each has unique requirements concerning the sections that must be included in the paper.

Literature review

A literature review is a critical summary of what the scientific literature says about your specific topic or question. Often student research in APA fields falls into this category. Your professor might ask you to write this kind of paper to demonstrate your familiarity with work in the field pertinent to the research you hope to conduct.

A literature review typically contains the following sections:

• Introduction section
• List of references

Some instructors may also want you to write an abstract for a literature review, so be sure to check with them when given an assignment. Also, the length of a literature review and the required number of sources will vary based on course and instructor preferences.

NOTE: A literature review and an annotated bibliography are not synonymous. If you are asked to write an annotated bibliography, you should consult the Publication Manual of the American Psychological Association for the APA Format for Annotated Bibliographies.

Experimental report

In many of the social sciences, you will be asked to design and conduct your own experimental research. If so, you will need to write up your paper using a structure that is more complex than that used for just a literature review. We have a complete resource devoted to writing an experimental report in the field of psychology here .

This structure follows the scientific method, but it also makes your paper easier to follow by providing those familiar cues that help your reader efficiently scan your information for:

• Why the topic is important (covered in your introduction)
• What the problem is (also covered in your introduction)
• What you did to try to solve the problem (covered in your methods section)
• What you found (covered in your results section)
• What you think your findings mean (covered in your discussion section)

Thus an experimental report typically includes the following sections.

• Introduction
• Appendices(if necessary)
• Tables and/or figures (if necessary)

Make sure to check the guidelines for your assignment or any guidelines that have been given to you by an editor of a journal before you submit a manuscript containing the sections listed above.

As with the literature review, the length of this report may vary by course or by journal, but most often it will be determined by the scope of the research conducted.

Other papers

If you are writing a paper that fits neither of these categories, follow the guidelines about General Format , consult your instructor, or look up advice in the Publication Manual of the American Psychological Association .

When submitting a manuscript to a journal, make sure you follow the guidelines described in the submission policies of that publication, and include as many sections as you think are applicable to presenting your material. Remember to keep your audience in mind as you are making this decision. If certain information is particularly pertinent for conveying your research, then ensure that there is a section of your paper that adequately addresses that information.

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APA 7th Edition

• In-Text Citations
• Books/Book Chapters
• Social Media/Apps/Websites
• Video/TV/Podcasts
• Presentations/Dissertations
• Data/Unpublished Works
• Visual Works
• Legal Materials

This guide will provide information on how to cite your sources in-text and in your reference list using APA style & formatting. Click the tabs for an example of each. 

Publication Manual of the American Psychological Association

Examples of Reference Lists & In-text Citations

Additional resources:.

• Sample APA Papers from APA Style Download the Word Document and use the template for your APA papers.
• Sample Student Paper using APA from OWL Includes notes to explain the details. From APA Style. Use this sample paper as a guide for headings, in-text citations, references, & more.

The Purdue Online Writing Lab (OWL) APA Guide

• No Date : if there isn't a date, the reference starts with the author. 

Lucas, T. (n.d.). Mother nature revolts.  U.S. News & World

Report.   https://www.usnews.com/news/national-news/articles/2020-04-17/why-you-still-havent-gotten-your-coronavirus-stimulus-check

The in-text citation will look like this:

According to Lucas,  ... (n.d.).

It is hypothesized that Coronavirus was the planet's way of making a point (Lucas, n.d.).

• No Author : if there isn't an author, the reference starts with the title. 

Mother nature revolts. (2020, March 29). U.S. News & World

"Mother nature revolts" ... (2020).

It is hypothesized that Coronavirus was the planet's way of making a point ("Mother nature revolts", 2020).

• Exact quotes:  page numbers (or paragraph numbers) must be included for exact quotes: 

It was hypothesized that, "Coronavirus was the planet's way of making a point" (Lucas, 2017, p. 5.).

It was  hypothesized that, "Coronavirus w as the planet's way of making a point" (Lucas, 2017,  para . 5.).

• ​ ​ DOI = Digital Object Identifier.   If an item has a DOI, it must be included in the reference.  Not all articles and e-books will have a DOI.
• The research ... (Gonzalez & Perez., 2020).
• According to Perez, .... (2020).

If there are 2 authors, include both of them every time in the in-text citations.

• The research ... (Gonzalez et al., 2020).
• According to Gonzalez et al. .... (2020).
• Up to 20 Authors : names and initials for all 20 authors must be provided in the reference list. It will look like this:

The in-text citation will look like this: 

According to Smith et al. ... (2020). 

The research .... (Smith, et al., 2020).

• 21+ Authors : for sources with more than 20 authors, the first 19 are included in the reference list followed by an ellipses and the final author. It looks like this:

• Citing Multiple Works :  when referring to multiple works in-text, place the citations in alphabetical order, separating them with semicolons.

(Edwards, 2012; Flygare et al., 2019; Steba, 2015).

• Citing Multiple Works by the same author(s) in the same year:  when multiple references have identical author (or authors) and publication year, include a lowercase letter after the year. The year–letter combination is used in both the in-text citation and the reference list entry. Use only the year with a letter in the in-text citation, even if the reference list entry contains a more specific date.

Smith, J. & Ortiz, P. (2019a, February). Judge Judy and her impact on society.  Journal of Social Science, 15 (2), 16-25.

http://journsocscience.com

Smith, J. & Ortiz, P. (2019b, March). Judge Judy impacts social justice.  Journal of Social Science, 15 (2), 16-25.

Smith and Ortiz found ... (2019a).

...  (Smith & Ortiz, 2019b).

• Citing a Source within a Source :

Arpan, L. M., & Raney, A. A. (2003). An experimental investigation of news source and the hostile media effect. Journalism & Mass Communication Quarterly 80 (2), 265-281.

(Gunther, 1992, as cited in Arpan & Raney, 2003);

The in-text citation gives credit to the source used. This is the same one included in the reference list.

• Citing Personal Communication (for example via email or messenger):

Because readers cannot retrieve the communication, it is not included in the reference list.   The communication is cited in the text of the paper only.  

S. Fernandez (personal communication, April 15, 2020) ...

... (S. Fernandez, personal communication, April 15, 2020). 

• Organizational Authors with Common Acronyms

If an organization or government entity is commonly known by it's acronym, it can be used in-text but the full name should be spelled out in the reference list.  

The first in-text citation will look like this: 

The Centers for Medicare & Medicaid Services (CMS, 2020), described ... 

... (The Centers for Medicare & Medicaid Services [CMS], 2020).

In-text citations that follow can use the acronym:

According to CMS ... (2020).

... (CMS, 2020).

The reference list will always include the spelled out organization (and not the acronym):

The Centers for Medicare & Medicaid Servic e s. (2020).  ...

If you use Artificial Intelligence generated text such as ChatGPT, it needs to be cited.

However, before you get help from ai, check your syllabus and/or ask your professor whether it is allowed , example to model:.

When prompted “Why is toxic positivity a problem in the workplace,” the ChatGPT-generated text indicated that “toxic positivity can be harmful as it can lead to a dismissive attitude towards the concerns or struggles of employees” (OpenAI, 2023).

OpenAI. (2023).  ChatGPT  (Mar 23 version). [Large language model].  https://chat.openai.com/chat

• APA Style: How to cite ChatGPT We, the APA Style team, are not robots. We can all pass a CAPTCHA test, and we know our roles in a Turing test. And, like so many nonrobot human beings this year, we’ve spent a fair amount of time reading, learning, and thinking about issues related to large language models, artificial intelligence (AI), AI-generated text, and specifically ChatGPT. We’ve also been gathering opinions and feedback about the use and citation of ChatGPT. Thank you to everyone who has contributed and shared ideas, opinions, research, and feedback.

In-Text Citation Basics:

• APA uses author-date citation system
• Informs the reader where the information came from
• Refers the reader to the source information
• Use sparingly
• Page numbers (or paragraph numbers) must be included for exact quotes
• Only include relevant material
• Block quotes = 40+ words, no quotation marks, indented

Neu (2015) stated that “healthcare is a right” (p. 6).

In 2017, Smith argued that “healthcare is a privilege” (para. 3) and therefore should not be free.

The notion that healthcare is a right has been debated by many authors (Neu, 2105, p. 6; Smith, 2017, para. 3).

Blockquote:

Avoid Plagiarism

Indicate info. from various sources

Easily identify sources

Adds credibility to your writing

Expands breadth/depth of your writing

Acknowledge the sources that you have borrowed from

• The reference list starts on a new page with the word References , centered and bold

Double-spaced

Your reference list must match your in-text citations and vice versa

Alphabetical list by author’s last name

Use a hanging indent for every line after the first

For titles of books, articles, & websites in reference lists, capitalize only:

• the first word
• the first word after a colon
• proper nouns

In-Text Citation Examples:

General reference form :.

Author Last Name(s), First Initial, Middle Initial. (Date). Title of article. Title of Source, volume number (issue number), page

numbers. DOI or URL.  

Reference Examples: 

Articles with a doi (digital object identifier):.

McConkey, S.M., & Christiansen, S.J. (2020). Language learning in Miami: A cross-linguistic model of diverse Spanish

dialects. Psychological Review , 128 (8), 25-61. http://dx.doi.org/10.1037/rev0000126

Articles without a DOI:

Andersen, J. (2020, March 30). Miami and Coronavirus. New York Times . C1

Pearsong, S., Padron, M., & Ortiz, J. (2020, January 1). What the New Year has in store for the U.S. The New

Yorker.  https://www.newyorker.com/culture/culture-desk/the-homemade-insight-of-fetch-the-bolt-cutters

Article with an article number or eLocator

​ Smith, T. C., Castillo, M. J., Jackson, G. L., Simpson, B. B., Lantry, R. S., O'Reilly, S. T., Rosenberg, F., Lee, L. H., Cox,

G.,  Harris, H. L., Kass, P., Gonzalez, W. L., Hughes, W., Carter, D., Campbell, C., Baker, A. B., Flores, T., Gray, W. E., 

Green, G., ... Nelson, T. P. (2020).  Miami and Coronavirus. PLOS ONE, 14 (1), Article

e0209899.  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0209899  

Reference Examples:

TIP: In the 7th edition, publisher location is no longer required when citing books.

Authored book with a DOI (Digital Object Identifier) Example:

Nadler, J.T. & Voyles, E. C. (2020).  Stereotypes: The incidence and impacts of bias.  ABC-CLIO.

http://dx.doi.org/10.3389 /fpsyg.2015.0004

Authored book without a DOI (print or ebook) Example:

Johnson, D.W. (2020). The customer revolution in healthcare: Delivering kinder, smarter, affordable care for all. McGraw-Hill.

Edited book without a DOI Example:

Hacker Hughes, J. (Ed). (2017). Military veteran psychological health and social care: Contemporary approaches. Routledge.

Chapter in an edited book with a DOI Example:

Stone, C. (2020). Stereotypes of veterans. In J. T. Nadler & Voyles, E. C. (Eds.), Stereotypes: The incidence and impacts of

bias . (pp. 213-225). ABC-CLIO. http://dx.doi.org/10.3389 /fpsyg.2015.0004.

Chapter in an edited book without a DOI Example:

Weinstock, R., Leong, G. B., & Silva, J. A. (2003). Defining forensic psychiatry: Roles and responsibilities. In R. Rosner (Ed.),

Principles and practice of forensic psychiatr y (2nd ed., pp. 7-13). CRC Press.

Website Examples:

Centers for Disease Control and Prevention. (2018, January 23). People at high risk of developing flu-related complications.

https://www.cdc.gov/flu/about/disease/high_risk.htm

Martin Lillie, C. M. (2016, December 29). Be kind to yourself: How self-compassion can improve your resiliency. Mayo Clinic.

https://www.mayoclinic.org/health-lifestyle/adult-health/in-depth/self-compassion-can-improve-your-resiliency/art-20267193

Boddy, J., Neumann, T., Jennings, S., Morron, V., Alderson, P., Rees, R., & Gibson, W. (n.d.). Ethics principles. The

Research Ethics Guidebook: A Resource for Social Scientists. http://www.ethicsguidebook.ac.uk/EthicsPrinciples

.... (Boddy, et al., n.d.).

... ( Centers for Disease Control and Prevention, 2018).

Body et al. ...  (n.d.) ...

According to the Centers for Disease Control and Prevention, ... (2018).

Tweet Example:

Obama, M. [@MichelleObama] (2020, April 18). Thank you to all the essential workers who are getting up every day and

risking their lives on our behalf. @LauraWBush and I were honored to show our support for their heroic efforts during

tonight's @GlblCtzn’s One World: #TogetherAtHome Special. [video attached] Tweet. Twitter

https://twitter.com/MichelleObama/status/1251695525017137159

.... (Obama, 2020).

Obama (2020) ...

Twitter Profile Example:

Bush, Laura. [@laurawbush]. (n.d.). Tweets . [Twitter profile] Twitter. Retrieved from April 18, 2020 from

https://twitter.com/laurawbush.

.... (Bush, n.d.).

Bush (n.d.) ...  

Facebook Page Example:

Coronavirus (Covid-19) Information Center. (n.d.). Home [Facebook page]. Facebook. Retrieved April 18, 2020, from

https://www.facebook.com/coronavirus_info/

.... ( Coronavirus  ( Covid-19 ) Information Center, n.d. ).

Coronavirus  ( Covid-19 ) Information Center (n.d.) ...

Facebook Post Example:

National institute of mental health. (2018, november 28). suicide affects all ages, genders, races, and ethnicities. check out, these 5 action steps for helping someone in emotional pain [infographic]. facebook. http://bit.ly/321qstq.

.... ( National Institute of Mental Health, 2018 ).

The National Institute of Mental Health ...   (2018) ...

Instagram Video or Photo Example: APA Style [@officialapastyle]. (2018, December 5). Welcome to the official Instagram for #APAStyle! We’re here to help you

With your apa style questions [instagram photograph]. retrieved from https://www.instagram.com/p/bq-a-dvblih/.

.... (APA Style, 2018).

APA Style ...  (2018) ...

Instagram Profile: Star Wars [@starwars]. (n.d.). Posts [Instagram profile]. Retrieved December 10, 2018, from

Https://www.instagram.com/starwars/.

.... (Star Wars, n.d.).

Star Wars ...  (n.d.) ...

Instagram Highlight: APA Style [@officialapastyle]. (n.d.). FAQs [Instagram highlight]. Retrieved December 10, 2018, from

Https://www.instagram.com/s/aglnagxpz2h0oje3otc2odkwntk5mtc5mty1/.

.... (APA Style, n.d.).

APA Style ...  (n.d.) ...

Blog Post Example:

APA Style. (2020, March 19). What’s new in the seventh edition  Publication  Manual.  APA Style.

https://apastyle.apa.org/blog/ whats-new-7e

.... (APA Style, 2020).

The APA Style (2020) ...

Mobile App Examples:

Actual app:.

https://itunes.apple.com/us/app/epocrates/id281935788?mt=8  

Entry in the App:

Epocrates. (2019). Interaction check: Aspirin + sertraline. In Epocrates medical references (version 18.12) [Mobile app]. App

Store. https://itunes.apple.com/us/app/epocrates/id281935788?mt=8

.... (Epocrates, 2019).

Epocrates ... (2019). 

YouTube Example:

Cutts, S. (2017, November 24). Happiness [Video]. YouTube. ​ https:youtube.com/24455202929

.... (Cutts, 2017).

Cutts (2017) ...

Ted Talk Example:

Kowalski, C. (2017, November). The critical role librarians play in the

opioid  crisis  https ://www.ted.com/talks/chera_kowalski_the_critical_role_librarians_play_in_the_opioid_crisis

.... (Kowalski, 2017).

Kowalski (2017) ...

Film or Video Example:

Forman, M. (Director). (1975). One flew over the cuckoo’s nest [Film]. United Artists.

.... (Forman, 1975).

Forman (1975) ...

TV Example:

Wolf, D. (1999-present). Law & Order: Special Victims Unit  [TV Series].  Wolf Entertainment Productions; NBC.

.... (Wolf , 1999-present ).

Wolf (1999-present) ...

Podcast Example:

Poor, N., Woods, E. & Williams, A. (2016-present). Ear Hustle [Audio podcast]. PRX.   https://www.earhustlesq.com/

.... (Poor et al., 2016-present).

Poor et al. (2016-present) ...

Report Examples:

National Cancer Institute. (2018). Facing forward: Life after cancer treatment (NIH Publication No. 18-2424). U.S. Department

of Health and Human Services, National Institutes of Health. https://www.cancer.gov/publications/patient-education/life-after-treatment.pdf

Blackwell, D. L., Lucas, J. W., & Clarke, T. C. (2014). Summary health statistics for U.S. adults: National Health Interview

Survey, 2012. Centers for Disease Control and Prevention. https://www.cdc.gov/nchs/data/series/sr_10/sr10_260.pdf

U.S. Securities and Exchange Commission. (2017). Agency financial report: Fiscal year 2017.

https://www.sec.gov/files/sec-2017-agency-financial-report.pdf

.... ( National Cancer Institute , 2018).

... (Blackwell, et al., 2014).

... ( U.S. Securities and Exchange Commission, 2017).

National Cancer Institute (2018) ...

Blackwell, et al. (2014) ...

According to the U.S. Securities and Exchange Commission (2017), ...

Presentation Example:

O'Reilly, P., Edwards, C., & Hamil, S. K. (2020, April 1-3).  How to cite properly in APA.  [Paper presentation]. Florida Library Association 100th Annual Conference, Orlando, FL, United States.

*Replace [Paper presentation] with [Conference presentation] or [Poster presentation] as needed. 

.... (O'Reilly, et al., 2020).

O'Reilly et al. (2020) ...

Dissertation Examples:

Unpublished:

Hodges, L. (2018). Instructional design perceptions and practices of faculty [Unpublished doctoral dissertation]. Florida

International University.

Sanderson, K. R. (2012). Time orientation in organizations: Polychronicity and multitasking (Publication No. 3554209)

[Doctoral dissertation Florida International University]. Proquest Dissertations & Theses.

.... (Hodges, 2018).

Sanderson (2012) ...

Unpublished Manuscript Example:

Yen, J., Chen, Y., Rigotti, A., & Deckard C. (2016). Linking good customer services to increased sales: An observational study

[Unpublished manuscript]. College of Business, Florida International University.

Include the department and institution where the work was published if possible. 

....  (Yen et al., 2016).

Yen, et al. (2016) ...

Data Set Examples:

Published Data:

Pew Research Center (2018).  Core Trend Survey  [Data set]. 

https ://www.pewresearch.org/internet/dataset/core-trends - survey/

Unpublished Unnamed Raw Data Set :

Baer,  R. A. (2015). [Unpublished raw data on the correlations between the Five Facet Mindfulness Questionnaire and the

Kentucky Inventory of Mindfulness Skills]. University of Kentucky.

.... (Pew Research Center, 2018).

Baer (2015) ...

Infographic Example:

Florida Library Association. (2020, February). Federal funds in Florida  [Infographic]. https://www.flalib.org/advocacy ​

.... (Florida Library Association [FLA], 2020).

Florida Library Association [FLA] (2020) ...

Map Example:

Florida International University GIS Center. (2015). BIKE – Bicycle Knowledge Explorer (Palm Beach)  [Map].

https://maps.fiu.edu/gis/research/projects/255/bike-%E2%80%93-bicycle-knowledge-explorer-palm-beach

.... ( Florida International  University  GIS Center , 2015).

Florida International  University  GIS Center  (2015) ...

Photograph Example:

McCurry, S. (1985). Afghan girl [Photograph]. National Geographic.

https://www.nationalgeographic.com/magazine/national-geographic-magazine-50-years-of-covers/#/ngm-1985-jun-714.jpg

.... (McCurry, 1985).

McCurry (1985) ...

PowerPoint or Lecture Notes Example:

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What is a Literature Review? How to Write It (with Examples)

A literature review is a critical analysis and synthesis of existing research on a particular topic. It provides an overview of the current state of knowledge, identifies gaps, and highlights key findings in the literature. 1 The purpose of a literature review is to situate your own research within the context of existing scholarship, demonstrating your understanding of the topic and showing how your work contributes to the ongoing conversation in the field. Learning how to write a literature review is a critical tool for successful research. Your ability to summarize and synthesize prior research pertaining to a certain topic demonstrates your grasp on the topic of study, and assists in the learning process. 

Table of Contents

• What is the purpose of literature review? 
• a. Habitat Loss and Species Extinction: 
• b. Range Shifts and Phenological Changes: 
• c. Ocean Acidification and Coral Reefs: 
• d. Adaptive Strategies and Conservation Efforts: 

How to write a good literature review 

• Choose a Topic and Define the Research Question: 
• Decide on the Scope of Your Review: 
• Select Databases for Searches: 
• Conduct Searches and Keep Track: 
• Review the Literature: 
• Organize and Write Your Literature Review: 
• How to write a literature review faster with Paperpal? 
• Frequently asked questions 

What is a literature review?

A well-conducted literature review demonstrates the researcher’s familiarity with the existing literature, establishes the context for their own research, and contributes to scholarly conversations on the topic. One of the purposes of a literature review is also to help researchers avoid duplicating previous work and ensure that their research is informed by and builds upon the existing body of knowledge.

What is the purpose of literature review?

A literature review serves several important purposes within academic and research contexts. Here are some key objectives and functions of a literature review: 2  

1. Contextualizing the Research Problem: The literature review provides a background and context for the research problem under investigation. It helps to situate the study within the existing body of knowledge. 

2. Identifying Gaps in Knowledge: By identifying gaps, contradictions, or areas requiring further research, the researcher can shape the research question and justify the significance of the study. This is crucial for ensuring that the new research contributes something novel to the field. 

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3. Understanding Theoretical and Conceptual Frameworks: Literature reviews help researchers gain an understanding of the theoretical and conceptual frameworks used in previous studies. This aids in the development of a theoretical framework for the current research. 

4. Providing Methodological Insights: Another purpose of literature reviews is that it allows researchers to learn about the methodologies employed in previous studies. This can help in choosing appropriate research methods for the current study and avoiding pitfalls that others may have encountered. 

5. Establishing Credibility: A well-conducted literature review demonstrates the researcher’s familiarity with existing scholarship, establishing their credibility and expertise in the field. It also helps in building a solid foundation for the new research. 

6. Informing Hypotheses or Research Questions: The literature review guides the formulation of hypotheses or research questions by highlighting relevant findings and areas of uncertainty in existing literature. 

Literature review example

Let’s delve deeper with a literature review example: Let’s say your literature review is about the impact of climate change on biodiversity. You might format your literature review into sections such as the effects of climate change on habitat loss and species extinction, phenological changes, and marine biodiversity. Each section would then summarize and analyze relevant studies in those areas, highlighting key findings and identifying gaps in the research. The review would conclude by emphasizing the need for further research on specific aspects of the relationship between climate change and biodiversity. The following literature review template provides a glimpse into the recommended literature review structure and content, demonstrating how research findings are organized around specific themes within a broader topic. 

Literature Review on Climate Change Impacts on Biodiversity:

Climate change is a global phenomenon with far-reaching consequences, including significant impacts on biodiversity. This literature review synthesizes key findings from various studies: 

a. Habitat Loss and Species Extinction:

Climate change-induced alterations in temperature and precipitation patterns contribute to habitat loss, affecting numerous species (Thomas et al., 2004). The review discusses how these changes increase the risk of extinction, particularly for species with specific habitat requirements. 

b. Range Shifts and Phenological Changes:

Observations of range shifts and changes in the timing of biological events (phenology) are documented in response to changing climatic conditions (Parmesan & Yohe, 2003). These shifts affect ecosystems and may lead to mismatches between species and their resources. 

c. Ocean Acidification and Coral Reefs:

The review explores the impact of climate change on marine biodiversity, emphasizing ocean acidification’s threat to coral reefs (Hoegh-Guldberg et al., 2007). Changes in pH levels negatively affect coral calcification, disrupting the delicate balance of marine ecosystems. 

d. Adaptive Strategies and Conservation Efforts:

Recognizing the urgency of the situation, the literature review discusses various adaptive strategies adopted by species and conservation efforts aimed at mitigating the impacts of climate change on biodiversity (Hannah et al., 2007). It emphasizes the importance of interdisciplinary approaches for effective conservation planning. 

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Writing a literature review involves summarizing and synthesizing existing research on a particular topic. A good literature review format should include the following elements. 

Introduction: The introduction sets the stage for your literature review, providing context and introducing the main focus of your review. 

• Opening Statement: Begin with a general statement about the broader topic and its significance in the field. 
• Scope and Purpose: Clearly define the scope of your literature review. Explain the specific research question or objective you aim to address. 
• Organizational Framework: Briefly outline the structure of your literature review, indicating how you will categorize and discuss the existing research. 
• Significance of the Study: Highlight why your literature review is important and how it contributes to the understanding of the chosen topic. 
• Thesis Statement: Conclude the introduction with a concise thesis statement that outlines the main argument or perspective you will develop in the body of the literature review. 

Body: The body of the literature review is where you provide a comprehensive analysis of existing literature, grouping studies based on themes, methodologies, or other relevant criteria. 

• Organize by Theme or Concept: Group studies that share common themes, concepts, or methodologies. Discuss each theme or concept in detail, summarizing key findings and identifying gaps or areas of disagreement. 
• Critical Analysis: Evaluate the strengths and weaknesses of each study. Discuss the methodologies used, the quality of evidence, and the overall contribution of each work to the understanding of the topic. 
• Synthesis of Findings: Synthesize the information from different studies to highlight trends, patterns, or areas of consensus in the literature. 
• Identification of Gaps: Discuss any gaps or limitations in the existing research and explain how your review contributes to filling these gaps. 
• Transition between Sections: Provide smooth transitions between different themes or concepts to maintain the flow of your literature review. 

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Conclusion: The conclusion of your literature review should summarize the main findings, highlight the contributions of the review, and suggest avenues for future research. 

• Summary of Key Findings: Recap the main findings from the literature and restate how they contribute to your research question or objective. 
• Contributions to the Field: Discuss the overall contribution of your literature review to the existing knowledge in the field. 
• Implications and Applications: Explore the practical implications of the findings and suggest how they might impact future research or practice. 
• Recommendations for Future Research: Identify areas that require further investigation and propose potential directions for future research in the field. 
• Final Thoughts: Conclude with a final reflection on the importance of your literature review and its relevance to the broader academic community. 

Conducting a literature review

Conducting a literature review is an essential step in research that involves reviewing and analyzing existing literature on a specific topic. It’s important to know how to do a literature review effectively, so here are the steps to follow: 1  

Choose a Topic and Define the Research Question:

• Select a topic that is relevant to your field of study. 
• Clearly define your research question or objective. Determine what specific aspect of the topic do you want to explore? 

Decide on the Scope of Your Review:

• Determine the timeframe for your literature review. Are you focusing on recent developments, or do you want a historical overview? 
• Consider the geographical scope. Is your review global, or are you focusing on a specific region? 
• Define the inclusion and exclusion criteria. What types of sources will you include? Are there specific types of studies or publications you will exclude? 

Select Databases for Searches:

• Identify relevant databases for your field. Examples include PubMed, IEEE Xplore, Scopus, Web of Science, and Google Scholar. 
• Consider searching in library catalogs, institutional repositories, and specialized databases related to your topic. 

Conduct Searches and Keep Track:

• Develop a systematic search strategy using keywords, Boolean operators (AND, OR, NOT), and other search techniques. 
• Record and document your search strategy for transparency and replicability. 
• Keep track of the articles, including publication details, abstracts, and links. Use citation management tools like EndNote, Zotero, or Mendeley to organize your references. 

Review the Literature:

• Evaluate the relevance and quality of each source. Consider the methodology, sample size, and results of studies. 
• Organize the literature by themes or key concepts. Identify patterns, trends, and gaps in the existing research. 
• Summarize key findings and arguments from each source. Compare and contrast different perspectives. 
• Identify areas where there is a consensus in the literature and where there are conflicting opinions. 
• Provide critical analysis and synthesis of the literature. What are the strengths and weaknesses of existing research? 

Organize and Write Your Literature Review:

• Literature review outline should be based on themes, chronological order, or methodological approaches. 
• Write a clear and coherent narrative that synthesizes the information gathered. 
• Use proper citations for each source and ensure consistency in your citation style (APA, MLA, Chicago, etc.). 
• Conclude your literature review by summarizing key findings, identifying gaps, and suggesting areas for future research. 

Whether you’re exploring a new research field or finding new angles to develop an existing topic, sifting through hundreds of papers can take more time than you have to spare. But what if you could find science-backed insights with verified citations in seconds? That’s the power of Paperpal’s new Research feature!  

How to write a literature review faster with Paperpal?

Paperpal, an AI writing assistant, integrates powerful academic search capabilities within its writing platform. With the Research feature, you get 100% factual insights, with citations backed by 250M+ verified research articles, directly within your writing interface with the option to save relevant references in your Citation Library. By eliminating the need to switch tabs to find answers to all your research questions, Paperpal saves time and helps you stay focused on your writing.   

Here’s how to use the Research feature:  

• Ask a question: Get started with a new document on paperpal.com. Click on the “Research” feature and type your question in plain English. Paperpal will scour over 250 million research articles, including conference papers and preprints, to provide you with accurate insights and citations. 
• Review and Save: Paperpal summarizes the information, while citing sources and listing relevant reads. You can quickly scan the results to identify relevant references and save these directly to your built-in citations library for later access. 
• Cite with Confidence: Paperpal makes it easy to incorporate relevant citations and references into your writing, ensuring your arguments are well-supported by credible sources. This translates to a polished, well-researched literature review. 

The literature review sample and detailed advice on writing and conducting a review will help you produce a well-structured report. But remember that a good literature review is an ongoing process, and it may be necessary to revisit and update it as your research progresses. By combining effortless research with an easy citation process, Paperpal Research streamlines the literature review process and empowers you to write faster and with more confidence. Try Paperpal Research now and see for yourself.  

Frequently asked questions

A literature review is a critical and comprehensive analysis of existing literature (published and unpublished works) on a specific topic or research question and provides a synthesis of the current state of knowledge in a particular field. A well-conducted literature review is crucial for researchers to build upon existing knowledge, avoid duplication of efforts, and contribute to the advancement of their field. It also helps researchers situate their work within a broader context and facilitates the development of a sound theoretical and conceptual framework for their studies.

Literature review is a crucial component of research writing, providing a solid background for a research paper’s investigation. The aim is to keep professionals up to date by providing an understanding of ongoing developments within a specific field, including research methods, and experimental techniques used in that field, and present that knowledge in the form of a written report. Also, the depth and breadth of the literature review emphasizes the credibility of the scholar in his or her field.  

Before writing a literature review, it’s essential to undertake several preparatory steps to ensure that your review is well-researched, organized, and focused. This includes choosing a topic of general interest to you and doing exploratory research on that topic, writing an annotated bibliography, and noting major points, especially those that relate to the position you have taken on the topic. 

Literature reviews and academic research papers are essential components of scholarly work but serve different purposes within the academic realm. 3 A literature review aims to provide a foundation for understanding the current state of research on a particular topic, identify gaps or controversies, and lay the groundwork for future research. Therefore, it draws heavily from existing academic sources, including books, journal articles, and other scholarly publications. In contrast, an academic research paper aims to present new knowledge, contribute to the academic discourse, and advance the understanding of a specific research question. Therefore, it involves a mix of existing literature (in the introduction and literature review sections) and original data or findings obtained through research methods. 

Literature reviews are essential components of academic and research papers, and various strategies can be employed to conduct them effectively. If you want to know how to write a literature review for a research paper, here are four common approaches that are often used by researchers.  Chronological Review: This strategy involves organizing the literature based on the chronological order of publication. It helps to trace the development of a topic over time, showing how ideas, theories, and research have evolved.  Thematic Review: Thematic reviews focus on identifying and analyzing themes or topics that cut across different studies. Instead of organizing the literature chronologically, it is grouped by key themes or concepts, allowing for a comprehensive exploration of various aspects of the topic.  Methodological Review: This strategy involves organizing the literature based on the research methods employed in different studies. It helps to highlight the strengths and weaknesses of various methodologies and allows the reader to evaluate the reliability and validity of the research findings.  Theoretical Review: A theoretical review examines the literature based on the theoretical frameworks used in different studies. This approach helps to identify the key theories that have been applied to the topic and assess their contributions to the understanding of the subject.  It’s important to note that these strategies are not mutually exclusive, and a literature review may combine elements of more than one approach. The choice of strategy depends on the research question, the nature of the literature available, and the goals of the review. Additionally, other strategies, such as integrative reviews or systematic reviews, may be employed depending on the specific requirements of the research.

The literature review format can vary depending on the specific publication guidelines. However, there are some common elements and structures that are often followed. Here is a general guideline for the format of a literature review:  Introduction:   Provide an overview of the topic.  Define the scope and purpose of the literature review.  State the research question or objective.  Body:   Organize the literature by themes, concepts, or chronology.  Critically analyze and evaluate each source.  Discuss the strengths and weaknesses of the studies.  Highlight any methodological limitations or biases.  Identify patterns, connections, or contradictions in the existing research.  Conclusion:   Summarize the key points discussed in the literature review.  Highlight the research gap.  Address the research question or objective stated in the introduction.  Highlight the contributions of the review and suggest directions for future research.

Both annotated bibliographies and literature reviews involve the examination of scholarly sources. While annotated bibliographies focus on individual sources with brief annotations, literature reviews provide a more in-depth, integrated, and comprehensive analysis of existing literature on a specific topic. The key differences are as follows: 

References 

• Denney, A. S., & Tewksbury, R. (2013). How to write a literature review.  Journal of criminal justice education ,  24 (2), 218-234. 
• Pan, M. L. (2016).  Preparing literature reviews: Qualitative and quantitative approaches . Taylor & Francis. 
• Cantero, C. (2019). How to write a literature review.  San José State University Writing Center . 

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An In-Depth Literature Review of E-Portfolio Implementation in Higher Education: Processes, Barriers, and Strategies

Authors: Hongyan Yang (The University of Tennessee, Knoxville) , Rachel Wong (The University of Tennessee, Knoxville)

Literature Review

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This is an accepted article with a DOI pre-assigned that is not yet published.

This literature review examines the implementation of e-portfolios in higher education, with a focus on the implementation process, potential barriers, and strategies for overcoming challenges. This review seeks to provide instructional designers and higher education instructors with design strategies to effectively implement e-portfolios. Through an analysis of seventeen studies, we identified six common steps in the implementation process, including identifying a purpose, stakeholders, and platform, conducting workshops, creating e-portfolios, and evaluating the project. The implementation process also raised eight concerns, including concerns related to technology, policy, pedagogy, artifact quality, privacy, student motivation, academic integrity, and teacher workload. To address these concerns, existing strategies suggest that successful implementation requires training and policy support, student-centered pedagogy, criteria for assessing artifacts, privacy and data protection, feedback, anti-plagiarism measures, and shared successful models.

Keywords: literature review, e-Portfolio, implementation, higher education

Accepted on 20 Apr 2024

Peer reviewed, creative commons attribution-noncommercial-sharealike 4.0, harvard-style citation.

Yang, H & Wong, R. () 'An In-Depth Literature Review of E-Portfolio Implementation in Higher Education: Processes, Barriers, and Strategies', Issues and Trends in Learning Technologies . doi: 10.2458/itlt.5809

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Yang, H & Wong, R. An In-Depth Literature Review of E-Portfolio Implementation in Higher Education: Processes, Barriers, and Strategies. Issues and Trends in Learning Technologies. ; doi: 10.2458/itlt.5809

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Yang, H & Wong, R. (, ). An In-Depth Literature Review of E-Portfolio Implementation in Higher Education: Processes, Barriers, and Strategies. Issues and Trends in Learning Technologies doi: 10.2458/itlt.5809

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