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What's a Literature Review?

A literature review involves gathering existing research on a particular topic. It typically provides the background on what is known so far on the issue you have chosen, and suggests areas for future research to fill in gaps. 

A literature review may be a stage in a larger research project, or a research project in and of itself.

A literature review is:

  • a synthesis or overview of the research on a particular topic
  • a critical analysis of the existing literature
  • a means to identify gaps in the existing research or areas of further study

A literature review is not:

  • A list of articles
  • An annotated bibliography

 

What's the Purpose of a Literature Review?

Key Steps in the Literature Review Process

  • You may need to do some exploratory searching of the literature to get a sense of scope, to determine whether you need to narrow or broaden your focus.
  • Identify databases that provide the most relevant sources, and identify relevant terms to add to your search strategy.
  • Finalize your research question.
  • How far back in time will your search go? 
  • What types of sources will you include in your literature review? Are you interested in journal articles, books, dissertations/theses, and reports from non-profits or government agencies? This will largely depend on your discipline. 
  • Are you focused on finding a particular type of research study (e.g. you only are interested in finding randomized controlled trials)?
  • You may find the following worksheet helpful in defining the scope of your review. If you are working as a research assistant, you will want to work through the questions with your faculty supervisor.
  • Conduct searches in the published literature via the identified databases. For a list of recommended databases in your field, visit the relevant Subject Guide. Depending on your topic, you may also want to search databases listed on other subject guides (e.g. if your topic is exam stress and nursing students, you might look at the databases listed on both the Nursing and Education guides).
  • Examine the citations of on-point articles for keywords, authors, and previous research (via references). You can also use tools like Google Scholar or Scopus to see who has cited articles since their publication. This process, called citation chaining, is explained in more detail in the following videos (Part 1, Part 2).
  • Watch for sources that have been cited many times by other scholars. These are often seminal works—meaning they are considered foundational to the field. Sometimes these articles/books were published many years ago, so if you are using date limits in your Google Scholar or database search you may be excluding them from your results.
  • Save your search results in a citation management tool such as Zotero or Mendeley.
  • Check with your professor or a librarian to make sure your search has been comprehensive.
  • Evaluate the strengths and weaknesses of individual sources.
  • Group your results in to an organizational structure that will support why your research needs to be done, or that provides the answer to your research question.  
  • Develop your conclusions.
  • Are there gaps in the literatureaspects of the topic where little or no research has been conducted or questions remain? One place to find references to gaps in the literature are in the discussion/conclusions sections of research articles, as authors are expected to identify areas for future research. 
  • Who has done significant research on the topic?
  • Is there consensus or debate on this topic?
  • Which methodological approaches work best for answering the research question?
  • Pick an organizational structure, i.e., themes, approaches, concepts, methodologies.
  • Organize your citations and focus on your research question and pertinent studies.
  • Compile your reference or works cited page.

Note: The first four steps are the best points at which to contact a librarian. Your librarian can help you determine the best databases to use for your topic, assess scope, and formulate a search strategy.

Content adapted from Steps in the Literature Review Process by University of Texas Libraries, CC-BY-NC-2.0

Strategies to Help You Organize Your Literature Review

It is important to find a way to organize your ideas as you are reading articles. Some people find it helpful to create a synthesis matrix or concept map while they are reading to help them identify major themes and how different authors contribute to the theme.

Synthesis Matrix

The matrix method is one way of working on your literature review. to do their literature review more efficiently. 

Use a table in Word with a row for each of your sources. Develop columns based on key themes in your paper with room for more columns that emerge from your readings. When a source relates to one of the columns, note the key point in the box, and add a page number so you can find the point again quickly.

Topic: Pet ownership during COVID-19 and impact on owners and pets

  Jezierski et al., 2021a Jezierski et al., 2021b Philapou et al., 2021 Ikeuchi et al., 2021
Impact of pet on owners Cats reduce “psychological tensions” p. 8 Dogs positive impact on owner mental state p.5 Dogs and cats led to poorer quality of life, no impact stress/loneliness (p. 425) Pets reduced neg impact social isolation older adults (p. 7)
Impact on the pet Cat behaviour unchanged or positively impacted p.8 Dog behaviour unchanged or positive but more problems if in lockdown or no back yard  p. 6    
Impact of type of pet       Dog ownership more impact on loneliness than cat ownership (p. 6)

Additional Resources

Concept Mapping

Concept mapping is another way to visualize connections between sources during your literature review. 

Additional Resources

License

Much of the content on this Academic Research Skills guide has been adapted from the University of Alberta Library, which shared its guide content under a CC BY-NC-SA 4.0 license.