tenses in literature review

Verbs are direct, vigorous communicators. Use a chosen verb tense consistently throughout the same and adjacent paragraphs of a paper to ensure smooth expression.

Use the following verb tenses to report information in APA Style papers.


Literature review (or whenever discussing other researchers’ work)	Past	Martin (2020) addressed
	Present perfect	Researchers have studied
Method Description of procedure	Past	Participants took a survey
Method Description of procedure	Present perfect	Others have used similar approaches
Reporting of your own or other researchers’ results	Past	Results showed Scores decreased Hypotheses were not supported
Personal reactions	Past	I felt surprised
	Present perfect	I have experienced
	Present	I believe
Discussion of implications of results or of previous statements	Present	The results indicate The findings mean that
Presentation of conclusions, limitations, future directions, and so forth	Present	We conclude Limitations of the study are Future research should explore

Verb tense is covered in the seventh edition APA Style manuals in the Publication Manual Section 4.12 and the Concise Guide Section 2.12

From the APA Style blog

Check your tone: A blog post on keeping it professional

Check your tone: Keeping it professional

When writing an APA Style paper, present ideas in a clear and straightforward manner. In this kind of scholarly writing, keep a professional tone.

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The “no second-person” myth

Many writers believe the “no second-person” myth, which is that there is an APA Style guideline against using second-person pronouns such as “you” or “your.” On the contrary, you can use second-person pronouns in APA Style writing.

The “no first-person” myth

Whether expressing your own views or actions or the views or actions of yourself and fellow authors, use the pronouns “I” and “we.”

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Navigating the not-so-hidden treasures of the APA Style website

This post links directly to APA Style topics of interest that users may not even know exist on the website.

Welcome, singular “they”

This blog post provides insight into how this change came about and provides a forum for questions and feedback.

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Mastering Verb Tenses in Literature Reviews

In this blog, we will see what tense you should use in the literature review section of your research paper. We will look at some examples of literature review excerpts from published research papers and understand the tenses used in them.

1. Which Tense to Use?

You may have to use multiple tenses in your literature review depending on what you are saying. The present tense is generally used in statements to introduce the literature review, and the past tense is typically used when you are talking about specific papers. The following table summarizes different types of statements you might typically include in your literature review and the corresponding tenses you should use.




		(2003)

2. Usage Example #1

In the first statement, we make a general statement about the topic by saying that this topic has been studied extensively in the literature, and therefore we have used the present tense. In the second sentence, we say that although there has been a lot of research on this topic, it is still relevant today and therefore we have used the present perfect tense.

✔ Example of simple present & present perfect tense use This is widely reported and extensively explored in the literature. This has been of interest for a considerable period, ranging from the early 90s. _ Broad summary (Simple Present) _ Ongoing situation (Present Perfect)

3. Usage Example #2

In the first statement, we begin the literature review by saying that there are many techniques available in the literature to combat weight gain. This statement is only a general summary of previous research on this topic. So we used the present perfect tense. Then, when we then talk about individual works from the literature, we present their results in the past tense.

✔ Example of present perfect & past tense use A number of solutions have been proposed to deal with the problem of weight gain and obesity. He simplest approach was proposed by Lee et al. (2003) which involves fasting. Wang et al. (2010) proposed an alternative solution of using an intragastric balloon. _ Broad summary (Present Perfect) _ Specific papers from past (Past Tense)

4. Usage Example #3

In the following example, in the first sentence we are talking about a collective finding that is generally accepted in the field, and therefore we have used the present perfect tense. In the second statement, we are talking about a finding from a specific work conducted in the past and have therefore used the past tense.

✔ Example of present perfect & past tense use It has been shown that there is a direct correlation between social media and children’s mental health[1-10]. Recently, Elan et al. [11] showed that these findings also applies to teenagers and older population. _ Accepted findings (Present Perfect) _ Specific paper from past (Past Tense)

5. Usage Example #4

In the example below, we talk about past research papers and that’s why we have used the past tense.

✔ Example of past tense use In the initial work presented by Kim et al. (2004), they showed that there is a direct link between Vitamin C and obesity. Smith et al. (2006) replicated this finding in a much larger study. Recently, it was pointed out by Young et al. (2010) that Vitamin C is also related to many other diseases. _ Specific papers from past (Past Tense)

If you have any questions, please drop a comment below, and we will answer as soon as possible. We also recommend you to refer to our other blogs on academic writing tools , academic writing resources , academic writing phrases and research paper examples which are relevant to the topic discussed in this blog.

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What is the correct tense to use in a literature review? [duplicate]

I am currently writing my bachelor thesis and have to do a small literature review for it. Unfortunately, I don't know which tense I should use. Do you write ?

Hager et. al (2020) show/indicate .....
Hager et. al (2020) showed/indicated....
Hager et. al (2020) have shown/indicated ....

I am quite confused about what tense to use.

literature-review

Welcome to Academia SE! There are many questions that generally answer the question, "What tense should I use in a paper?" These usually include pointers on what tense to use in the literature review section of a paper, e.g., academia.stackexchange.com/questions/3608/… . – Tripartio Commented Aug 14, 2023 at 8:47

4 Answers 4

I don't think there are any general standards. It depends on your field and, potentially, your adviser's preferences. I tend to prefer the active tense (since I think that any sentence that mentions a work kind of presents said work), but pick whatever you like as long as you are consistent about it.

(My field is maths/computer science; other domains might have common standards)

2 What if their is a clear chronological gap in the literature -- early authors claimed that, while current authors claim that...? That is being consistent about a change in thinking. (Probably not what is happening in the OP's case, but worth considering.) – Martin F Commented Aug 14, 2023 at 22:45

Generally speaking any are acceptable. If you focus on the authors then "did show" or "have shown" feels about right. But if you take the citation to mean the paper itself, then the present tense is fine since the paper still exists and does still show...

However, advisors can be a bit picky on some such things, so it would be good to ask whether they think it makes a difference.

In a few rare circumstances, future might even work if a paper hasn't yet appeared, as in one of your own. But, as Gnosophilon says, consistency is probably a good choice.

In almost all cases people will understand you no matter how you write it. But there are exceptions, such as when some things need to be put in historical context, perhaps with older results being replace by new research. That doesn't seem to be your concern here, though.

My preference would be option 2, the simple past. There is IMO a good reason to prefer it. Quite often it is natural to say something like "Hager et al. showed [statement]. Subsequently, Smith et al. showed [stronger statement]." This (or anything else that indicates the papers were written at different past times) doesn't really work with either of the other options.

The already-given advice to ask your advisor is good general advice for academia. It doesn't always work; some advisors are less helpful than they should be. But if they will be grading your work, they can be the most reliable about how they want it to look.

Another piece of general writing advice is to look for already-published examples in your field. A lot of papers have a section that is a small literature review - how do they do it? This is nice because you can learn more than just what tense to use.

Not the answer you're looking for? Browse other questions tagged literature-review .

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Mastering verb tenses in literature reviews

PMID: 14735767

Deciding on which verb tense to use when writing the literature review section of a manuscript is challenging. Editors find that verb tense problems are common in literature report sections of manuscripts. Authors, reviewers, and editors need to be able to spot incorrect verb tenses in literature reviews. Try editing verb tenses in the sample enclosed in this article and compare your work with that of a nursing journal editor.

PubMed Disclaimer

Ten Simple Rules for Writing a Literature Review

Marco pautasso.

1 Centre for Functional and Evolutionary Ecology (CEFE), CNRS, Montpellier, France

2 Centre for Biodiversity Synthesis and Analysis (CESAB), FRB, Aix-en-Provence, France

Literature reviews are in great demand in most scientific fields. Their need stems from the ever-increasing output of scientific publications [1] . For example, compared to 1991, in 2008 three, eight, and forty times more papers were indexed in Web of Science on malaria, obesity, and biodiversity, respectively [2] . Given such mountains of papers, scientists cannot be expected to examine in detail every single new paper relevant to their interests [3] . Thus, it is both advantageous and necessary to rely on regular summaries of the recent literature. Although recognition for scientists mainly comes from primary research, timely literature reviews can lead to new synthetic insights and are often widely read [4] . For such summaries to be useful, however, they need to be compiled in a professional way [5] .

When starting from scratch, reviewing the literature can require a titanic amount of work. That is why researchers who have spent their career working on a certain research issue are in a perfect position to review that literature. Some graduate schools are now offering courses in reviewing the literature, given that most research students start their project by producing an overview of what has already been done on their research issue [6] . However, it is likely that most scientists have not thought in detail about how to approach and carry out a literature review.

Reviewing the literature requires the ability to juggle multiple tasks, from finding and evaluating relevant material to synthesising information from various sources, from critical thinking to paraphrasing, evaluating, and citation skills [7] . In this contribution, I share ten simple rules I learned working on about 25 literature reviews as a PhD and postdoctoral student. Ideas and insights also come from discussions with coauthors and colleagues, as well as feedback from reviewers and editors.

Rule 1: Define a Topic and Audience

How to choose which topic to review? There are so many issues in contemporary science that you could spend a lifetime of attending conferences and reading the literature just pondering what to review. On the one hand, if you take several years to choose, several other people may have had the same idea in the meantime. On the other hand, only a well-considered topic is likely to lead to a brilliant literature review [8] . The topic must at least be:

interesting to you (ideally, you should have come across a series of recent papers related to your line of work that call for a critical summary),
an important aspect of the field (so that many readers will be interested in the review and there will be enough material to write it), and
a well-defined issue (otherwise you could potentially include thousands of publications, which would make the review unhelpful).

Ideas for potential reviews may come from papers providing lists of key research questions to be answered [9] , but also from serendipitous moments during desultory reading and discussions. In addition to choosing your topic, you should also select a target audience. In many cases, the topic (e.g., web services in computational biology) will automatically define an audience (e.g., computational biologists), but that same topic may also be of interest to neighbouring fields (e.g., computer science, biology, etc.).

Rule 2: Search and Re-search the Literature

After having chosen your topic and audience, start by checking the literature and downloading relevant papers. Five pieces of advice here:

keep track of the search items you use (so that your search can be replicated [10] ),
keep a list of papers whose pdfs you cannot access immediately (so as to retrieve them later with alternative strategies),
use a paper management system (e.g., Mendeley, Papers, Qiqqa, Sente),
define early in the process some criteria for exclusion of irrelevant papers (these criteria can then be described in the review to help define its scope), and
do not just look for research papers in the area you wish to review, but also seek previous reviews.

The chances are high that someone will already have published a literature review ( Figure 1 ), if not exactly on the issue you are planning to tackle, at least on a related topic. If there are already a few or several reviews of the literature on your issue, my advice is not to give up, but to carry on with your own literature review,

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Object name is pcbi.1003149.g001.jpg

The bottom-right situation (many literature reviews but few research papers) is not just a theoretical situation; it applies, for example, to the study of the impacts of climate change on plant diseases, where there appear to be more literature reviews than research studies [33] .

discussing in your review the approaches, limitations, and conclusions of past reviews,
trying to find a new angle that has not been covered adequately in the previous reviews, and
incorporating new material that has inevitably accumulated since their appearance.

When searching the literature for pertinent papers and reviews, the usual rules apply:

be thorough,
use different keywords and database sources (e.g., DBLP, Google Scholar, ISI Proceedings, JSTOR Search, Medline, Scopus, Web of Science), and
look at who has cited past relevant papers and book chapters.

Rule 3: Take Notes While Reading

If you read the papers first, and only afterwards start writing the review, you will need a very good memory to remember who wrote what, and what your impressions and associations were while reading each single paper. My advice is, while reading, to start writing down interesting pieces of information, insights about how to organize the review, and thoughts on what to write. This way, by the time you have read the literature you selected, you will already have a rough draft of the review.

Of course, this draft will still need much rewriting, restructuring, and rethinking to obtain a text with a coherent argument [11] , but you will have avoided the danger posed by staring at a blank document. Be careful when taking notes to use quotation marks if you are provisionally copying verbatim from the literature. It is advisable then to reformulate such quotes with your own words in the final draft. It is important to be careful in noting the references already at this stage, so as to avoid misattributions. Using referencing software from the very beginning of your endeavour will save you time.

Rule 4: Choose the Type of Review You Wish to Write

After having taken notes while reading the literature, you will have a rough idea of the amount of material available for the review. This is probably a good time to decide whether to go for a mini- or a full review. Some journals are now favouring the publication of rather short reviews focusing on the last few years, with a limit on the number of words and citations. A mini-review is not necessarily a minor review: it may well attract more attention from busy readers, although it will inevitably simplify some issues and leave out some relevant material due to space limitations. A full review will have the advantage of more freedom to cover in detail the complexities of a particular scientific development, but may then be left in the pile of the very important papers “to be read” by readers with little time to spare for major monographs.

There is probably a continuum between mini- and full reviews. The same point applies to the dichotomy of descriptive vs. integrative reviews. While descriptive reviews focus on the methodology, findings, and interpretation of each reviewed study, integrative reviews attempt to find common ideas and concepts from the reviewed material [12] . A similar distinction exists between narrative and systematic reviews: while narrative reviews are qualitative, systematic reviews attempt to test a hypothesis based on the published evidence, which is gathered using a predefined protocol to reduce bias [13] , [14] . When systematic reviews analyse quantitative results in a quantitative way, they become meta-analyses. The choice between different review types will have to be made on a case-by-case basis, depending not just on the nature of the material found and the preferences of the target journal(s), but also on the time available to write the review and the number of coauthors [15] .

Rule 5: Keep the Review Focused, but Make It of Broad Interest

Whether your plan is to write a mini- or a full review, it is good advice to keep it focused 16 , 17 . Including material just for the sake of it can easily lead to reviews that are trying to do too many things at once. The need to keep a review focused can be problematic for interdisciplinary reviews, where the aim is to bridge the gap between fields [18] . If you are writing a review on, for example, how epidemiological approaches are used in modelling the spread of ideas, you may be inclined to include material from both parent fields, epidemiology and the study of cultural diffusion. This may be necessary to some extent, but in this case a focused review would only deal in detail with those studies at the interface between epidemiology and the spread of ideas.

While focus is an important feature of a successful review, this requirement has to be balanced with the need to make the review relevant to a broad audience. This square may be circled by discussing the wider implications of the reviewed topic for other disciplines.

Rule 6: Be Critical and Consistent

Reviewing the literature is not stamp collecting. A good review does not just summarize the literature, but discusses it critically, identifies methodological problems, and points out research gaps [19] . After having read a review of the literature, a reader should have a rough idea of:

the major achievements in the reviewed field,
the main areas of debate, and
the outstanding research questions.

It is challenging to achieve a successful review on all these fronts. A solution can be to involve a set of complementary coauthors: some people are excellent at mapping what has been achieved, some others are very good at identifying dark clouds on the horizon, and some have instead a knack at predicting where solutions are going to come from. If your journal club has exactly this sort of team, then you should definitely write a review of the literature! In addition to critical thinking, a literature review needs consistency, for example in the choice of passive vs. active voice and present vs. past tense.

Rule 7: Find a Logical Structure

Like a well-baked cake, a good review has a number of telling features: it is worth the reader's time, timely, systematic, well written, focused, and critical. It also needs a good structure. With reviews, the usual subdivision of research papers into introduction, methods, results, and discussion does not work or is rarely used. However, a general introduction of the context and, toward the end, a recapitulation of the main points covered and take-home messages make sense also in the case of reviews. For systematic reviews, there is a trend towards including information about how the literature was searched (database, keywords, time limits) [20] .

How can you organize the flow of the main body of the review so that the reader will be drawn into and guided through it? It is generally helpful to draw a conceptual scheme of the review, e.g., with mind-mapping techniques. Such diagrams can help recognize a logical way to order and link the various sections of a review [21] . This is the case not just at the writing stage, but also for readers if the diagram is included in the review as a figure. A careful selection of diagrams and figures relevant to the reviewed topic can be very helpful to structure the text too [22] .

Rule 8: Make Use of Feedback

Reviews of the literature are normally peer-reviewed in the same way as research papers, and rightly so [23] . As a rule, incorporating feedback from reviewers greatly helps improve a review draft. Having read the review with a fresh mind, reviewers may spot inaccuracies, inconsistencies, and ambiguities that had not been noticed by the writers due to rereading the typescript too many times. It is however advisable to reread the draft one more time before submission, as a last-minute correction of typos, leaps, and muddled sentences may enable the reviewers to focus on providing advice on the content rather than the form.

Feedback is vital to writing a good review, and should be sought from a variety of colleagues, so as to obtain a diversity of views on the draft. This may lead in some cases to conflicting views on the merits of the paper, and on how to improve it, but such a situation is better than the absence of feedback. A diversity of feedback perspectives on a literature review can help identify where the consensus view stands in the landscape of the current scientific understanding of an issue [24] .

Rule 9: Include Your Own Relevant Research, but Be Objective

In many cases, reviewers of the literature will have published studies relevant to the review they are writing. This could create a conflict of interest: how can reviewers report objectively on their own work [25] ? Some scientists may be overly enthusiastic about what they have published, and thus risk giving too much importance to their own findings in the review. However, bias could also occur in the other direction: some scientists may be unduly dismissive of their own achievements, so that they will tend to downplay their contribution (if any) to a field when reviewing it.

In general, a review of the literature should neither be a public relations brochure nor an exercise in competitive self-denial. If a reviewer is up to the job of producing a well-organized and methodical review, which flows well and provides a service to the readership, then it should be possible to be objective in reviewing one's own relevant findings. In reviews written by multiple authors, this may be achieved by assigning the review of the results of a coauthor to different coauthors.

Rule 10: Be Up-to-Date, but Do Not Forget Older Studies

Given the progressive acceleration in the publication of scientific papers, today's reviews of the literature need awareness not just of the overall direction and achievements of a field of inquiry, but also of the latest studies, so as not to become out-of-date before they have been published. Ideally, a literature review should not identify as a major research gap an issue that has just been addressed in a series of papers in press (the same applies, of course, to older, overlooked studies (“sleeping beauties” [26] )). This implies that literature reviewers would do well to keep an eye on electronic lists of papers in press, given that it can take months before these appear in scientific databases. Some reviews declare that they have scanned the literature up to a certain point in time, but given that peer review can be a rather lengthy process, a full search for newly appeared literature at the revision stage may be worthwhile. Assessing the contribution of papers that have just appeared is particularly challenging, because there is little perspective with which to gauge their significance and impact on further research and society.

Inevitably, new papers on the reviewed topic (including independently written literature reviews) will appear from all quarters after the review has been published, so that there may soon be the need for an updated review. But this is the nature of science [27] – [32] . I wish everybody good luck with writing a review of the literature.

Acknowledgments

Many thanks to M. Barbosa, K. Dehnen-Schmutz, T. Döring, D. Fontaneto, M. Garbelotto, O. Holdenrieder, M. Jeger, D. Lonsdale, A. MacLeod, P. Mills, M. Moslonka-Lefebvre, G. Stancanelli, P. Weisberg, and X. Xu for insights and discussions, and to P. Bourne, T. Matoni, and D. Smith for helpful comments on a previous draft.

Funding Statement

This work was funded by the French Foundation for Research on Biodiversity (FRB) through its Centre for Synthesis and Analysis of Biodiversity data (CESAB), as part of the NETSEED research project. The funders had no role in the preparation of the manuscript.

Dissertations & projects: Tenses

Research questions
The process of reviewing
Project management
Literature-based projects

What tenses will you use?

There are exceptions however, most notably in the literature review where you will use a mixture of past , present and present perfect tenses (don't worry, that is explained below), when discussing the implications of your findings when the present tense is appropriate and in the recommendations where you are likely to use the future tense.

The tenses used as standard practice in each of these sections of your report are given and explained below.

In your abstract

You have some leeway with tense use in your abstract and guidance does vary which can sometimes be confusing. We recommend the following:

Describing the current situation and reason for your study

Mostly use the present tense, i.e. "This is the current state of affairs and this is why this study is needed."

Occasionally, you may find the need to use something called the present perfect tense when you are describing things that happened in the past but are still relevant. The present perfect tense uses have/has and then the past participle of the verb i.e. Previous research on this topic has focused on...

Describing the aims of your study

Here you have a choice. It is perfectly acceptable to use either the present or past tense, i.e. "This study aims to..." or "This study aimed to..."

Describing your methodology

Use the past tense to describe what you did, i.e. "A qualitative approach was used." "A survey was undertaken to ...". "The blood sample was analysed by..."

Describing your findings

Use the past tense to describe what you found as it is specific to your study, i.e. "The results showed that...", "The analysis indicated that..."

Suggesting the implications of your study

Use the present tense as even though your study took place in the past, your implications remain relevant in the present, i.e. Results revealed x which indicates that..."

Example abstract

An example abstract with reasoning for the tenses chosen can be found at the bottom of this excellent blog post:

Using the Present Tense and Past Tense When Writing an Abstract

In your methodology

The methodology is one of the easiest sections when it comes to tenses as you are explaining to your reader what you did. This is therefore almost exclusively written in the past tense.

Blood specimens were frozen at -80 o C.

A survey was designed using the Jisc Surveys tool.

Participants were purposefully selected.

The following search strategy was used to search the literature:

Very occasionally you may use the present tense if you are justifying a decision you have taken (as the justification is still valid, not just at the time you made the decision). For example:

Purposeful sampling was used to ensure that a range of views were included. This sampling method maximises efficiency and validity as it identifies information-rich cases and ... (Morse & Niehaus, 2009).

In your discussion/conclusion

This will primarily be written in the present tense as you are generally discussing or making conclusions about the relevance of your findings at the present time. So you may write:

The findings of this research suggest that.../are potentially important because.../could open a new avenue for further research...

There will also be times when you use the past tense , especially when referring to part of your own research or previous published research research - but this is usually followed by something in the present tense to indicate the current relevance or the future tense to indicate possible future directions:

Analysis of the survey results found most respondents were not concerned with the processes, just the outcome. This suggests that managers should focus on...

These findings mirrored those of Cheung (2020), who also found that ESL pupils failed to understand some basic yet fundamental instructions. Addressing this will help ensure...

In your introduction

The introduction generally introduces what is in the rest of your document as is therefore describing the present situation and so uses the present tense :

Chapter 3 describes the research methodology.

Depending on your discipline, your introduction may also review the literature so please also see that section below.

In your literature review

The findings of some literature may only be applicable in the specific circumstances that the research was undertaken and so need grounding to that study. Conversely, the findings of other literature may now be accepted as established knowledge. Also, you may consider the findings of older literature to be still relevant and relatively recent literature be already superseded. The tenses you write in will help to indicate a lot of this to the reader. In other words, you will use a mix of tenses in your review depending on what you are implying.

Findings only applicable in the specific circumstances

Use the past tense . For example:

In an early study, Sharkey et al. (1991) found that isoprene emissions were doubled in leaves on sunnier sides of oak and aspen trees.

Using the past tense indicates that you are not implying that isoprene emissions are always doubled on the sunnier side of the trees, just that is what was found in the Sharkey et al. study.

Findings that are still relevant or now established knowledge

Mostly use the present tense , unless the study is not recent and the authors are the subject of the sentence (which you should use very sparingly in a literature review) when you may need to use a mixture of the past and present. For example:

A narrowing of what 'graduateness' represents damages students’ abilities to thrive as they move through what will almost certainly be complex career pathways (Holmes, 2001).

Holmes (2001) argued strongly that a narrowing of what 'graduateness' represents damages students’ abilities to thrive as they move through what will almost certainly be complex career pathways

Both of these imply that you think this is still the case (although it is perhaps more strongly implied in the first example). You may also want to use some academic caution too - such as writing 'may damage' rather than the more definite 'damages'.

Presenting your results

As with your methodology, your results section should be written in the past tense . This indicates that you are accepting that the results are specific to your research. Whilst they may have current implications, that part will not be considered until your discussion/conclusions section(s).

Four main themes were identified from the interview data.

There was a significant change in oxygen levels.

Like with the methodology, you will occasionally switch to present tense to write things like "Table 3.4 shows that ..." but generally, stick to the past tense.

In your recommendations

Not everyone will need to include recommendations and some may have them as part of the conclusions chapter. Recommendations are written in a mixture of the present tense and future tense :

It is recommended that ward layout is adapted, where possible, to provide low-sensory bays for patients with autism. These will still be useable by all patients but...

Useful links

Verb tenses in scientific manuscripts From International Science Editing
Which Verb Tenses Should I Use in a Research Paper? Blog from WordVice
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Mastering Verb Tenses in Literature Reviews

February 2004
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Verb tenses – literature.

This handout is available for download in DOCX format and PDF format .

Use of the correct verb tense allows you to express clearly the time relationships among your ideas. When deciding which verb tense to use, aim for consistency, simplicity, and clarity. Whenever possible, keep verbs in the same tense (consistency), and use either the simple present or the past tense (simplicity). Above all, choose the verb tense that most clearly expresses the idea you want to convey (clarity). In general, use the present tense to describe actions and states of being that are still true in the present; use the past tense to describe actions or states of being that occurred exclusively in the past.

Below are some discipline-specific guidelines for how to use verb tenses effectively in literature and the humanities. For details on tenses in science writing, see handout “Verb Tenses—Science.”

Decribing the Text

Use the present tense to describe fictional events that occur in the text:.

(This use of present tense is referred to as "the historical present.")

In Milton's Paradise Lost , Satan tempts Eve in the form of a serpent.
Voltaire's Candide encounters numerous misfortunes throughout his travels.

Use the present perfect tense to describe an event that occurs in the text previous to the principal event you are describing:

The governess questions the two children because she believes they have seen the ghosts.
Convinced that Desdemona has been unfaithful to him, Othello strangles her.

Use the past tense when referring to an event occurring before the story begins:

In the opening scenes of Hamlet , the men are visited by the ghost of Hamlet's father, whom Claudius murdered .

Providing Factual Information

Use the present tense to report your interpretations and the interpretations of other sources:.

Odysseus represents the archetypal epic hero.
Flanagan suggests that Satan is the protagonist of Paradise Lost .

Use the past tense to explain historical context or elements of the author's life that occurred exclusively in the past:

Hemingway drew on his experiences in World War I in constructing the character of Jake Barnes.

Combining Fact and Fiction

When writing about literature, use both present and past tense when combining observations about fictional events from the text (present tense) with factual information (past tense):.

James Joyce, who grew up in the Catholic faith, draws on church doctrine to illuminate the roots of Stephen Dedalus' guilt.
In Les Belles Images , Simone de Beauvoir accurately portrays the complexities of a marriage even though she never married in her lifetime.

Credit: Adapted from “Verb Tense,” Hamilton University Writing Center. 16 October 2017, https://www.hamilton.edu/academics/centers/writing/writing-resources/verb-tense .

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Use of verb tenses in APA, Chicago and MLA styles

APA, Chicago and MLA are the three main referencing systems/writing styles used at Massey. Re commendations they make in relation to verb tenses are summarized below. Implementing these recommendations may be especially important if you are planning to publish work in a journal that requires certain style guidelines to be followed. However, for assignments or theses at Massey, it is important to be guided by any advice your lecturer or supervisor may provide in relation to use of tenses.

Referring to the ideas of other researchers (e.g. in a literature review)

Simple past tense

Brown (2019) argued that… However, Small (2020) suggested that…

Present perfect tense

Doñoso (1992) has demonstrated that…

Note : A shift of tense may be used to indicate that the research findings are still relevant.

Molland (2018) discovered that educational outcomes improve when….

Describing a method or procedure

The participants were interviewed…
Other researchers have followed a similar procedure.

Reporting results (your own or those of others)

The results supported the hypothesis

Personal reactions

Simple present tense

I believe …
I sensed a need for…
I have encountered challenges…

Commenting on the implications of results or findings

The findings indicate that…

Presenting limitations

The limitations of this case study are …

Conclusions

We can conclude that…

Suggesting future directions

This is an area for future research

Chicago and MLA

Both Chicago and MLA recommend the use of the simple present tense (e.g. ‘argues’) or present perfect tense (e.g. ‘has argued’) in the following situations:

No matter how long ago the work was published, the present tense is used, and even a deceased author ‘argues’ or ‘claims’.

Vasquez and Lopez argue that…
Bailey has outlined …

Discussing the actions of characters in literature

In Episode 4 of James Joyce’s Ulysses , Leopold Bloom walks to the butchers and buys a pork kidney

Narrating a fictional work’s plot

The plot of Ulysses centres on the wanderings and encounters of Leopold Bloom in Dublin, Ireland, over the course of a single day (16 June 1904)

Discussing a literary work, author or theme.

James Joyce structures Ulysses around 18 episodes that loosely mirror episodes in Homer's Odyssey
The themes of Ulysses include compassion and remorse

Note : If the context is clearly historical (rather than textual), use of the past tense is acceptable.

Ulysses was published on 2 February 1922, James Joyce’s 40th birthday.

These pages are provided as a guide to proper referencing. Your course, department, school, or institute may prescribe specific conventions, and their recommendations supersede these instructions. If you have questions not covered here, check in the style guide listed above, ask your course coordinator, or ask at Academic Q+A .

Page authorised by Director - Centre for Learner Success Last updated on 17 November, 2020

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APA 7: Verb Tense and Reporting Verbs

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The past tense or present perfect tense are appropriate when discussing a researcher’s work. Use the past or present perfect tenses in your in-text citations.

Berry (2022) and Gimmel et al. (2020) discovered that young people in foster care are at high risk for psychiatric disorders and poor long-term functional outcomes.

Wood (2018) and Winter (2008) used tribal critical race theory to explore the necessity and importance of letting Native people be the authority on their culture’s representation and allowing them to center their lived experiences and speak for themselves.

Present Perfect

Researchers have discovered that young people in foster care are at high risk for psychiatric disorders and poor long-term functional outcomes ( Berry, 2022; Gimmel et al., 2020) .

Other scholars have used tribal critical race theory to explore the necessity and importance of letting Native people be the authority on their culture’s representation and allowing them to center their lived experiences and speak for themselves (Wood, 2018; Writer, 2008).

Common Verbs (Reporting Verbs) Used in Academic Writing

Reporting verbs are used to convey what someone else has said or written. We use these in in-text citations to describe the ideas we are citing from authors’ works.

Tentative Reporting Verbs

admitted	hypothesized
alleged	imagined
anticipated	implied
cautioned	intimated
conceded	perceived
confused	postulated
commented	proposed
considered	questioned
doubted	recommended
guessed	speculated
hoped	suggested

Reporting Verb Handout

Verb Tense & Reporting Verbs

The information on this page formatted as a handout that can be printed for convenient reference as you write.

Neutral Reporting Verbs

accentuated	held the view that
accepted	hypothesized
accessed	identified
acknowledged	illustrated
added	implemented
administered	implied
advised	indicated
affected	inferred
agreed	interpreted
analyzed	investigated
appraised	justified
approached	knew
articulated	linked
assessed	listed
assumed	maintained
assured	mentioned
attributed	noted
believed	observed
categorized	outlined
characterized	pointed out
charted	posited
claimed	presented
clarified	professed
classified	proposed
concluded	realized
concurred	reasoned that
confirmed	recognized
commented	refined
compared	reflected
considered	regarded
contrasted	regulated
created	relied on
debated	reported
declared	represented
deduced	requested
defined	responded
demonstrated	revealed
derived	questioned
described	showed
detected	sought to
documented	specified
differentiated	stated
disagreed	studied
discovered	submitted
discussed	subscribed to
encouraged	suggested
estimated	surveyed
evaluated	theorized
examined	thought
excluded	took into consideration
explained	uncovered
explored	understood
expressed	used
felt	utilized
focused on	viewed
found	wondered
generated

Strong Reporting Verbs

accused	guaranteed
achieved	highlighted
acknowledged	ignored
advocated	inferred
affirmed	insisted
announced	intervened
argued	justified
asserted	maintained
assumed	misinterpreted
believed	monitored
blamed	negated
challenged	objected to
claimed	opposed
complained	persuaded
conceded	presumed
concluded	promised
condoned	prioritized
confirmed	proved
contended	recognized
contradicted	refuted
criticized	reinforced
declared	rejected
denied	required
determined	restricted
deviated	revealed
discounted	stressed
dismissed	substantiated
disputed	supported the view that
disregarded	threatened
doubted	underscored
emphasized	upheld
endorsed	urged
established	validated
exhorted	warned
extolled

Adapted from American Psychological Association publication manual (7th ed.).

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Grammar: Verb Tenses

Most common verb tenses in academic writing.

According to corpus research, in academic writing, the three tenses used the most often are the simple present , the simple past , and the present perfect (Biber et al., 1999; Caplan, 2012). The next most common tense for capstone writers is the future ; the doctoral study/dissertation proposal at Walden is written in this tense for a study that will be conducted in the future.

Biber, D., Johansson, S., Leech, G., Conrad, S., & Finegan, E. (1999). Longman grammar of written and spoken English . Pearson. https://doi.org/10.1162/089120101300346831

Caplan, N. A. (2012). Grammar choices for graduate and professional writers . University of Michigan Press.

Simple present: Use the simple present to describe a general truth or a habitual action. This tense indicates that the statement is generally true in the past, present, and future.

Example: The hospital admits patients whether or not they have proof of insurance.

Simple past : Use the simple past tense to describe a completed action that took place at a specific point in the past (e.g., last year, 1 hour ago, last Sunday). In the example below, the specific point of time in the past is 1998.

Example: Zimbardo (1998) researched many aspects of social psychology.

Present perfect: Use the present perfect to indicate an action that occurred at a nonspecific time in the past. This action has relevance in the present. The present perfect is also sometimes used to introduce background information in a paragraph. After the first sentence, the tense shifts to the simple past.

Example: Numerous researchers have used this method.
Example: Many researchers have studied how small business owners can be successful beyond the initial few years in business. They found common themes among the small business owners.

Future: Use the future to describe an action that will take place at a particular point in the future (at Walden, this is used especially when writing a proposal for a doctoral capstone study).

Example: I will conduct semistructured interviews.

Keep in mind that verb tenses should be adjusted after the proposal after the research has been completed. See this blog post about Revising the Proposal for the Final Capstone Document for more information.

APA Style Guidelines on Verb Tense

APA calls for consistency and accuracy in verb tense usage (see APA 7, Section 4.12 and Table 4.1). In other words, avoid unnecessary shifts in verb tense within a paragraph or in adjacent paragraphs to help ensure smooth expression.

Use the past tense (e.g., researchers presented ) or the present perfect (e.g., researchers have presented ) for the literature review and the description of the procedure if discussing past events.
Use the past tense to describe the results (e.g., test scores improved significantly).
Use the present tense to discuss implications of the results and present conclusions (e.g., the results of the study show …).

When explaining what an author or researcher wrote or did, use the past tense.

Patterson (2012) presented, found, stated, discovered…

However, there can be a shift to the present tense if the research findings still hold true:

King (2010) found that revising a document three times improves the final grade.
Smith (2016) discovered that the treatment is effective.

Verb Tense Guidelines When Referring to the Document Itself

To preview what is coming in the document or to explain what is happening at that moment in the document, use the present or future tense:

In this study, I will describe …
In this study, I describe …
In the next chapter, I will discuss …
In the next chapter, I discuss …

To refer back to information already covered, such as summaries of discussions that have already taken place or conclusions to chapters/sections, use the past tense:

Chapter 1 contained my original discussion of the research questions.
In summary, in this section, I presented information on…

Simple Past Versus the Present Perfect

Rules for the use of the present perfect differ slightly in British and American English. Researchers have also found that among American English writers, sometimes individual preferences dictate whether the simple past or the present perfect is used. In other words, one American English writer may choose the simple past in a place where another American English writer may choose the present perfect.

Keep in mind, however, that the simple past is used for a completed action. It often is used with signal words or phrases such as "yesterday," "last week," "1 year ago," or "in 2015" to indicate the specific time in the past when the action took place.

I went to China in 2010 .
He completed the employee performance reviews last month .

The present perfect focuses more on an action that occurred without focusing on the specific time it happened. Note that the specific time is not given, just that the action has occurred.

I have travelled to China.

The present perfect focuses more on the result of the action.

He has completed the employee performance reviews.

The present perfect is often used with signal words such as "since," "already," "just," "until now," "(not) yet," "so far," "ever," "lately," or "recently."

I have already travelled to China.
He has recently completed the employee performance reviews.
Researchers have used this method since it was developed.

Summary of English Verb Tenses

The 12 main tenses:

Simple present : She writes every day.
Present progressive: She is writing right now.
Simple past : She wrote last night.
Past progressive: She was writing when he called.
Simple future : She will write tomorrow.
Future progressive: She will be writing when you arrive.
Present perfect : She has written Chapter 1.
Present perfect progressive: She has been writing for 2 hours.
Past perfect: She had written Chapter 3 before she started Chapter 4.
Past perfect progressive: She had been writing for 2 hours before her friends arrived.
Future perfect: She will have written Chapter 4 before she writes Chapter 5.
Future perfect progressive: She will have been writing for 2 hours by the time her friends come over.

Conditionals:

Zero conditional (general truths/general habits).

Example: If I have time, I write every day.

First conditional (possible or likely things in the future).

Example: If I have time, I will write every day.

Second conditional (impossible things in the present/unlikely in the future).

Example : If I had time, I would write every day.

Third conditional (things that did not happen in the past and their imaginary results)

Example : If I had had time, I would have written every day.

Subjunctive : This form is sometimes used in that -clauses that are the object of certain verbs or follow certain adjectives. The form of the subjective is the simple form of the verb. It is the same for all persons and number.

Example : I recommend that he study every day.
Example: It is important that everyone set a writing schedule.

Verbs Video Playlist

Note that these videos were created while APA 6 was the style guide edition in use. There may be some examples of writing that have not been updated to APA 7 guidelines.

Grammar for Academic Writers: Common Verb Tenses in Academic Writing (video transcript)
Grammar for Academic Writers: Verb Tense Consistency (video transcript)
Grammar for Academic Writers: Advanced Subject–Verb Agreement (video transcript)
Mastering the Mechanics: Helping Verbs (video transcript)
Mastering the Mechanics: Past Tense (video transcript)
Mastering the Mechanics: Present Tense (video transcript)
Mastering the Mechanics: Future Tense (video transcript)

Related Resources

Knowledge Check: Verb Tenses

Didn't find what you need? Email us at [email protected] .

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Writing a Literature Review

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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.

A literature review is a document or section of a document that collects key sources on a topic and discusses those sources in conversation with each other (also called synthesis ). The lit review is an important genre in many disciplines, not just literature (i.e., the study of works of literature such as novels and plays). When we say “literature review” or refer to “the literature,” we are talking about the research ( scholarship ) in a given field. You will often see the terms “the research,” “the scholarship,” and “the literature” used mostly interchangeably.

Where, when, and why would I write a lit review?

There are a number of different situations where you might write a literature review, each with slightly different expectations; different disciplines, too, have field-specific expectations for what a literature review is and does. For instance, in the humanities, authors might include more overt argumentation and interpretation of source material in their literature reviews, whereas in the sciences, authors are more likely to report study designs and results in their literature reviews; these differences reflect these disciplines’ purposes and conventions in scholarship. You should always look at examples from your own discipline and talk to professors or mentors in your field to be sure you understand your discipline’s conventions, for literature reviews as well as for any other genre.

A literature review can be a part of a research paper or scholarly article, usually falling after the introduction and before the research methods sections. In these cases, the lit review just needs to cover scholarship that is important to the issue you are writing about; sometimes it will also cover key sources that informed your research methodology.

Lit reviews can also be standalone pieces, either as assignments in a class or as publications. In a class, a lit review may be assigned to help students familiarize themselves with a topic and with scholarship in their field, get an idea of the other researchers working on the topic they’re interested in, find gaps in existing research in order to propose new projects, and/or develop a theoretical framework and methodology for later research. As a publication, a lit review usually is meant to help make other scholars’ lives easier by collecting and summarizing, synthesizing, and analyzing existing research on a topic. This can be especially helpful for students or scholars getting into a new research area, or for directing an entire community of scholars toward questions that have not yet been answered.

What are the parts of a lit review?

Most lit reviews use a basic introduction-body-conclusion structure; if your lit review is part of a larger paper, the introduction and conclusion pieces may be just a few sentences while you focus most of your attention on the body. If your lit review is a standalone piece, the introduction and conclusion take up more space and give you a place to discuss your goals, research methods, and conclusions separately from where you discuss the literature itself.

Introduction:

An introductory paragraph that explains what your working topic and thesis is
A forecast of key topics or texts that will appear in the review
Potentially, a description of how you found sources and how you analyzed them for inclusion and discussion in the review (more often found in published, standalone literature reviews than in lit review sections in an article or research paper)
Summarize and synthesize: Give an overview of the main points of each source and combine them into a coherent whole
Analyze and interpret: Don’t just paraphrase other researchers – add your own interpretations where possible, 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 transition words and topic sentence to draw connections, comparisons, and contrasts.

Conclusion:

Summarize the key findings you have taken from the literature and emphasize their significance
Connect it back to your primary research question

How should I organize my lit review?

Lit reviews can take many different organizational patterns depending on what you are trying to accomplish with the review. Here are some examples:

Chronological : The simplest approach is to trace the development of the topic over time, which helps familiarize the audience with the topic (for instance if you are introducing something that is not commonly known in your field). If you choose this strategy, be careful to avoid simply listing and summarizing sources in order. Try to analyze the patterns, turning points, and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred (as mentioned previously, this may not be appropriate in your discipline — check with a teacher or mentor if you’re unsure).
Thematic : If you have found some recurring central themes that you will continue working with throughout your piece, you can organize your literature review into subsections that address different aspects of the topic. For example, if you are reviewing literature about women and religion, key themes can include the role of women in churches and the religious attitude towards women.
Qualitative versus quantitative research
Empirical versus theoretical scholarship
Divide the research by sociological, historical, or cultural sources
Theoretical : In many humanities articles, the literature review is the foundation for the theoretical framework. You can use it to discuss various theories, models, and definitions of key concepts. You can argue for the relevance of a specific theoretical approach or combine various theorical concepts to create a framework for your research.

What are some strategies or tips I can use while writing my lit review?

Any lit review is only as good as the research it discusses; make sure your sources are well-chosen and your research is thorough. Don’t be afraid to do more research if you discover a new thread as you’re writing. More info on the research process is available in our "Conducting Research" resources .

As you’re doing your research, create an annotated bibliography ( see our page on the this type of document ). Much of the information used in an annotated bibliography can be used also in a literature review, so you’ll be not only partially drafting your lit review as you research, but also developing your sense of the larger conversation going on among scholars, professionals, and any other stakeholders in your topic.

Usually you will need to synthesize research rather than just summarizing it. This means drawing connections between sources to create a picture of the scholarly conversation on a topic over time. Many student writers struggle to synthesize because they feel they don’t have anything to add to the scholars they are citing; here are some strategies to help you:

It often helps to remember that the point of these kinds of syntheses is to show your readers how you understand your research, to help them read the rest of your paper.
Writing teachers often say synthesis is like hosting a dinner party: imagine all your sources are together in a room, discussing your topic. What are they saying to each other?
Look at the in-text citations in each paragraph. Are you citing just one source for each paragraph? This usually indicates summary only. When you have multiple sources cited in a paragraph, you are more likely to be synthesizing them (not always, but often
Read more about synthesis here.

The most interesting literature reviews are often written as arguments (again, as mentioned at the beginning of the page, this is discipline-specific and doesn’t work for all situations). Often, the literature review is where you can establish your research as filling a particular gap or as relevant in a particular way. You have some chance to do this in your introduction in an article, but the literature review section gives a more extended opportunity to establish the conversation in the way you would like your readers to see it. You can choose the intellectual lineage you would like to be part of and whose definitions matter most to your thinking (mostly humanities-specific, but this goes for sciences as well). In addressing these points, you argue for your place in the conversation, which tends to make the lit review more compelling than a simple reporting of other sources.

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How to Write a Literature Review | Guide, Examples, & Templates

How to Write a Literature Review | Guide, Examples, & Templates

Published on January 2, 2023 by Shona McCombes . Revised on September 11, 2023.

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 that you can later apply to your paper, thesis, or dissertation topic .

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 summarize sources—it analyzes, synthesizes , and critically evaluates to give a clear picture of the state of knowledge on the subject.

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What is the purpose of 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, free lecture slides, other interesting articles, frequently asked questions, introduction.

Quick Run-through
Step 1 & 2

When you write a thesis , dissertation , or research paper , you will likely 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 its scholarly context
Develop a theoretical framework and methodology for your research
Position your work in relation to other researchers and theorists
Show how your research addresses a gap or contributes to a debate
Evaluate the current state of research and demonstrate your knowledge of the scholarly debates around your topic.

Writing literature reviews is a particularly important skill if you want to apply for graduate school or pursue a career in research. 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 problem and questions .

Make a list of keywords

Start by creating a list of keywords related to your research question. 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 as 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 useful 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 also use boolean operators to help narrow down your search.

Make sure to 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.

You likely won’t be able to read absolutely everything that has been written on your topic, so it will be necessary to evaluate which sources are most relevant to your research question.

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?
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 use our template to summarize and evaluate sources you’re thinking about using. Click on either button below to download.

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 is important to keep track of your sources with citations to avoid plagiarism . It can be helpful to make an annotated bibliography , where you compile full citation 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.

To begin organizing your literature review’s argument and structure, be sure you 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 organizing the body of a literature review. 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 summarizing sources in order.

Try to analyze 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 organize 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.

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, you can follow these tips:

Summarize and synthesize: give an overview of the main points of each source and combine them into a coherent whole
Analyze and interpret: don’t just paraphrase other researchers — add your own interpretations where possible, 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 transition words and topic sentences to draw connections, comparisons and contrasts

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

When you’ve finished writing and revising your literature review, don’t forget to proofread thoroughly before submitting. Not a language expert? Check out Scribbr’s professional proofreading services !

This article has been adapted into lecture slides that you can use to teach your students about writing a literature review.

Scribbr slides are free to use, customize, and distribute for educational purposes.

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

Sampling methods
Simple random sampling
Stratified sampling
Cluster sampling
Likert scales
Reproducibility

Statistics

Null hypothesis
Statistical power
Probability distribution
Effect size
Poisson distribution

Research bias

Optimism bias
Cognitive bias
Implicit bias
Hawthorne effect
Anchoring bias
Explicit 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.

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

To familiarize 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 thesis or dissertation . After the introduction , it grounds your research in a scholarly field and leads directly to your theoretical framework or methodology .

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 .

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Q. According to the APA Style (7th ed.) rules, which verb tense should I use in the different sections of my major research paper?

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Answered By: Theresa Bell (she/her/hers) Last Updated: Nov 04, 2021 Views: 4357

The 7th edition style manual of the American Psychological Association (APA) provides suggestions on which verb tense is appropriate for various sections of a thesis, major project or journal article:

Past or present perfect tense: "Literature review (or whenever discussing other researchers' work)" (APA, 2020, p. 118), "method" (APA, 2020, 118), and "description of procedure" (APA, 2020, 118)
Past tense: "Reporting of results" (APA, 2020, p. 118)
Present tense: "Discussion of implications of results" (APA, 2020, p. 118) and "presentation of conclusions, limitations, future directions, and so forth" (APA, 2020, p. 118).

As much as possible, try to be consistent with your chosen verb tense within a section "to ensure smooth expression" (APA, 2020, p. 118). If the verb tenses suggested above don't make sense for the purposes of your document, please check with your instructor or academic supervisor to get their recommendation on the best approach for your document.

American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.). https://doi.org/10.1037/0000165-000

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Citation Styles

Chicago Style
Annotated Bibliographies

What is a Lit Review?

How to write a lit review.

Video Introduction to Lit Reviews

Main Objectives

Examples of lit reviews, additional resources.

Zotero (Citation Management)

What is a literature review?

Either a complete piece of writing unto itself or a section of a larger piece of writing like a book or article
A thorough and critical look at the information and perspectives that other experts and scholars have written about a specific topic
A way to give historical perspective on an issue and show how other researchers have addressed a problem
An analysis of sources based on your own perspective on the topic
Based on the most pertinent and significant research conducted in the field, both new and old

A descriptive list or collection of summaries of other research without synthesis or analysis
An annotated bibliography
A literary review (a brief, critical discussion about the merits and weaknesses of a literary work such as a play, novel or a book of poems)
Exhaustive; the objective is not to list as many relevant books, articles, reports as possible
To convey to your reader what knowledge and ideas have been established on a topic
To explain what the strengths and weaknesses of that knowledge and those ideas might be
To learn how others have defined and measured key concepts
To keep the writer/reader up to date with current developments and historical trends in a particular field or discipline
To establish context for the argument explored in the rest of a paper
To provide evidence that may be used to support your own findings
To demonstrate your understanding and your ability to critically evaluate research in the field
To suggest previously unused or underused methodologies, designs, and quantitative and qualitative strategies
To identify gaps in previous studies and flawed methodologies and/or theoretical approaches in order to avoid replication of mistakes
To help the researcher avoid repetition of earlier research
To suggest unexplored populations
To determine whether past studies agree or disagree and identify strengths and weaknesses on both sides of a controversy in the literature

Choose a topic that is interesting to you; this makes the research and writing process more enjoyable and rewarding.
For a literature review, you'll also want to make sure that the topic you choose is one that other researchers have explored before so that you'll be able to find plenty of relevant sources to review.

Your research doesn't need to be exhaustive. Pay careful attention to bibliographies. Focus on the most frequently cited literature about your topic and literature from the best known scholars in your field. Ask yourself: "Does this source make a significant contribution to the understanding of my topic?"
Reading other literature reviews from your field may help you get ideas for themes to look for in your research. You can usually find some of these through the library databases by adding literature review as a keyword in your search.
Start with the most recent publications and work backwards. This way, you ensure you have the most current information, and it becomes easier to identify the most seminal earlier sources by reviewing the material that current researchers are citing.

Labeled "Scientific Cat Types" with cartoon of cat on back ("Nugget"), cat lying iwth legs tucked underneath ("loaf") and cat sprawled out ("noodle")

The organization of your lit review should be determined based on what you'd like to highlight from your research. Here are a few suggestions:

Chronology : Discuss literature in chronological order of its writing/publication to demonstrate a change in trends over time or to detail a history of controversy in the field or of developments in the understanding of your topic.
Theme: Group your sources by subject or theme to show the variety of angles from which your topic has been studied. This works well if, for example, your goal is to identify an angle or subtopic that has so far been overlooked by researchers.
Methodology: Grouping your sources by methodology (for example, dividing the literature into qualitative vs. quantitative studies or grouping sources according to the populations studied) is useful for illustrating an overlooked population, an unused or underused methodology, or a flawed experimental technique.

Be selective. Highlight only the most important and relevant points from a source in your review.
Use quotes sparingly. Short quotes can help to emphasize a point, but thorough analysis of language from each source is generally unnecessary in a literature review.
Synthesize your sources. Your goal is not to make a list of summaries of each source but to show how the sources relate to one another and to your own work.
Make sure that your own voice and perspective remains front and center. Don't rely too heavily on summary or paraphrasing. For each source, draw a conclusion about how it relates to your own work or to the other literature on your topic.
Be objective. When you identify a disagreement in the literature, be sure to represent both sides. Don't exclude a source simply on the basis that it does not support your own research hypothesis.
At the end of your lit review, make suggestions for future research. What subjects, populations, methodologies, or theoretical lenses warrant further exploration? What common flaws or biases did you identify that could be corrected in future studies?

cat lying on laptop, facing screen; text reads "needs moar ciatations"

Double check that you've correctly cited each of the sources you've used in the citation style requested by your professor (APA, MLA, etc.) and that your lit review is formatted according to the guidelines for that style.

Your literature review should:

Be focused on and organized around your topic.
Synthesize your research into a summary of what is and is not known about your topic.
Identify any gaps or areas of controversy in the literature related to your topic.
Suggest questions that require further research.
Have your voice and perspective at the forefront rather than merely summarizing others' work.
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Literature Review Tutorials and Samples - Wilson Library at University of La Verne
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Literature Review Guide: What tense should I use?

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
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The use of tenses in a literature review
Q: What tense should I use when writing a literature review?
Mastering Verb Tenses in Literature Reviews
Mastering Verb Tenses in Literature Reviews. Suzanne Hall Johnson, MN, RN,C, CNS. Deciding on which verb tense to use when writing the literature review sec tion ofa manuscript is challenging. Edi tors find that verb tense problems are common in literature report sections of manuscripts. Authors, reviewers, and ed itors need to be able to spot ...
Verb Tense
Verb tense - APA Style - American Psychological Association
Mastering Verb Tenses in Literature Reviews
The present tense is generally used in statements to introduce the literature review, and the past tense is typically used when you are talking about specific papers. The following table summarizes different types of statements you might typically include in your literature review and the corresponding tenses you should use.
What is the correct tense to use in a literature review?
What is the correct tense to use in a literature review?
Mastering verb tenses in literature reviews
Abstract. Deciding on which verb tense to use when writing the literature review section of a manuscript is challenging. Editors find that verb tense problems are common in literature report sections of manuscripts. Authors, reviewers, and editors need to be able to spot incorrect verb tenses in literature reviews.
Ten Simple Rules for Writing a Literature Review
Ten Simple Rules for Writing a Literature Review - PMC
Dissertations & projects: Tenses
There are exceptions however, most notably in the literature review where you will use a mixture of past, present and present perfect tenses (don't worry, that is explained below), when discussing the implications of your findings when the present tense is appropriate and in the recommendations where you are likely to use the future tense.
Mastering Verb Tenses in Literature Reviews
Deciding on which verb tense to use when writing the literature review section of a manuscript is challenging. Editors find that verb tense problems are common in literature report sections of manuscripts. Authors, reviewers, and editors need to be able to spot incorrect verb tenses in literature reviews.
Mastering Verb Tenses in Literature Reviews
Editors find that verb tense problems are common in literature report sections of manuscripts. Authors, reviewers, and editors need to be able to spot incorrect verb tenses in literature reviews ...
Verb Tenses
Verb Tenses - Literature. This handout is available for download in DOCX format and PDF format. Use of the correct verb tense allows you to express clearly the time relationships among your ideas. When deciding which verb tense to use, aim for consistency, simplicity, and clarity. Whenever possible, keep verbs in the same tense (consistency ...
Use of verb tenses in APA, Chicago and MLA styles
Use of verb tenses in APA, Chicago and MLA styles - OWLL
Libraries: APA 7: Verb Tense and Reporting Verbs
Verb Tense. The past tense or present perfect tense are appropriate when discussing a researcher's work. Use the past or present perfect tenses in your in-text citations. Past. Berry (2022) and Gimmel et al. (2020) discovered that young people in foster care are at high risk for psychiatric disorders and poor long-term functional outcomes.
How to Write a Stellar Literature Review
How to Write a Stellar Literature Review
Verb Tenses
Verb Tenses - Grammar - Academic Guides - Walden University
Writing a Literature Review
Writing a Literature Review - Purdue OWL
How to Write a Literature Review
How to Write a Literature Review | Guide, Examples, & ...
According to the APA Style (7th ed.) rules, which verb tense should I
According to the APA Style (7th ed.) rules, which verb tense ...
Q: What tenses should be used in the literature write-up?
Answer: By 'literature write-up,' we understand you mean 'literature review.'. Now, do you mean an entire paper that is a literature review or only the literature review section of the paper that typically comes in the Introduction? Anyway, the answer is: it depends, and it's quite possible to have multiple tenses in the literature ...
PDF Tense of Reporting in Dissertation Literature Reviews
tense, reporting verbs, literature review . The background . Reporting plays a pertinent and indispensable role in the buildup of any human language (Jacobson 1985: 96). Reporting verbs (refer to Appendix 1) in LRs represent a significant rhetorical choice, not only because of their high frequency (Chen 2008:126), but also because of
The Use of Tense in Literature Review
A recent flurry of tweets, seemingly initiated by @thesiswhisperer, discussed the use of tense in literature review.There doesn't seem to be a definitive rule to using either present or past tense (i.e. Smith (1989) argues… vs. Smith (1989) argued… etc.), though switching from one to the other can be problematic and should only be done within grammatical conventions.
Research Guides: Citation Styles: Literature Reviews
Step 4: Write. Be selective. Highlight only the most important and relevant points from a source in your review. Use quotes sparingly. Short quotes can help to emphasize a point, but thorough analysis of language from each source is generally unnecessary in a literature review. Synthesize your sources.
What tense should I use?
Literature Review Guide: What tense should I use? How to create Literature reviews. What is a Literature Review? How to start? Picking your research question and searching; Search strategies and Databases; Tutorials; Videos; How to organise the review; Examples of Literature Reviews; Library summary;

From the APA Style blog

Mastering Verb Tenses in Literature Reviews

1. Which Tense to Use?

2. Usage Example #1

3. Usage Example #2

4. Usage Example #3

5. Usage Example #4

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Ten Simple Rules for Writing a Literature Review

Rule 1: Define a Topic and Audience

Rule 2: Search and Re-search the Literature

Rule 3: Take Notes While Reading

Rule 4: Choose the Type of Review You Wish to Write

Rule 5: Keep the Review Focused, but Make It of Broad Interest

Rule 6: Be Critical and Consistent

Rule 7: Find a Logical Structure

Rule 8: Make Use of Feedback

Rule 9: Include Your Own Relevant Research, but Be Objective

Rule 10: Be Up-to-Date, but Do Not Forget Older Studies

Acknowledgments

Funding Statement

Dissertations & projects: Tenses

On this page:

What tenses will you use?

In your abstract

Describing the current situation and reason for your study

Describing the aims of your study

Describing your methodology

Describing your findings

Suggesting the implications of your study

Example abstract

In your methodology

In your discussion/conclusion

In your introduction

In your literature review

Findings only applicable in the specific circumstances

Findings that are still relevant or now established knowledge

Presenting your results

In your recommendations

Useful links

Mastering Verb Tenses in Literature Reviews

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Writing Resources

Decribing the Text

Use the present perfect tense to describe an event that occurs in the text previous to the principal event you are describing:

Use the past tense when referring to an event occurring before the story begins:

Providing Factual Information

Use the past tense to explain historical context or elements of the author's life that occurred exclusively in the past:

Combining Fact and Fiction

Massey University

Use of verb tenses in APA, Chicago and MLA styles

Referring to the ideas of other researchers (e.g. in a literature review)

Describing a method or procedure

Reporting results (your own or those of others)

Personal reactions

Commenting on the implications of results or findings

Presenting limitations

Conclusions

Suggesting future directions

Chicago and MLA

Discussing the actions of characters in literature

Narrating a fictional work’s plot

Discussing a literary work, author or theme.

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