Literature Review: How to Present Previous Studies (With Model)

The "previous studies" section of a research proposal is the part where you show what researchers before you found, where they agreed, and where they stopped short — the exact spot where your own study begins. Most guides tell you to "review the literature" and stop there, which is like being told to "cook the dinner." This guide goes the full distance: where the section sits in your document, how to find real studies without paying for a single database, how to summarize each study in five points, how to build a comparison matrix, and a complete written model you can hold your own draft against.

What the previous studies section means in a research proposal

In a proposal, "previous studies" — also called the literature review — is not a reading list and not a summary of everything ever written on your topic. It is a focused, organized answer to one question: what do we already know, and what do we not know yet? Wikipedia's overview of literature reviews puts the purpose plainly: to place new work in the context of existing scholarship and identify the gap the new work addresses. A supervisor reads this section to check two things: that you have read enough to be safe starting, and that your research question is not one somebody already answered.

That is why a good literature review can be short. Six focused studies analyzed well beat forty studies listed and forgotten.

Where the section sits in your document

In a standard proposal structure, the previous studies section comes after the introduction and research questions, and before the methodology. The order exists for a reason: the introduction declares the problem, the previous studies section proves the problem is real and unsolved, and the methodology explains how you will attack the specific gap the studies left open. When your literature review and your methodology describe different gaps, supervisors notice immediately — the proposal reads like two documents stitched together.

Keep one rule in mind: every study you include must earn its place by connecting to your research question. A study that is merely "related" is noise.

Why supervisors read this section first

Experienced supervisors often turn to the literature review before anything else, because it reveals in two minutes what the rest of the proposal takes twenty pages to hide. If the review cites only textbook summaries, the candidate has not touched primary research. If every citation is five years or older in a fast-moving field, the gap may already be closed. If studies are summarized one after another with no comparison, the candidate has collected but not analyzed. And if the review ends without stating the gap, the whole proposal is a body with no head.

How to find previous studies without paid databases

You do not need a university subscription to build a credible review. Start with Google Scholar, which indexes most peer-reviewed research and lets you filter by year — set it to the last five years first, then add older landmark studies deliberately: https://scholar.google.com

For education research in the Arab region, the Shamaa network indexes Arabic education studies and makes them searchable in Arabic: https://shamaa.org

For a third layer, use CORE, which aggregates millions of open-access papers from institutional repositories worldwide: https://core.ac.uk

The Internet Archive holds scanned theses and out-of-print academic books that regional libraries no longer hold: https://archive.org

Two more routes deserve mention even though they work differently. The Algerian platform ASJP aggregates university journals published in Algeria and is searchable in Arabic and French. And if you are enrolled anywhere, ask your library about trial access or shared subscriptions to databases like Dar Almandumah — many students never discover their university already pays for exactly the access they assume they cannot afford.

Search tip that saves days: find one recent, on-topic study, open its reference list, and follow its citations backwards. You will reconstruct the important conversation in an afternoon instead of a month.

The five-point study card

Summarizing is where most reviews die. The fix is to reduce every study to the same five points before writing any prose: the aim (what the study wanted to find out), the method (how it tried), the sample (who or what was studied, and how many), the results (what it actually found), and the gap (what it left unanswered). Write each card in your own words — never copy the abstract, because the moment you paste, you stop understanding.

Card for a famous real study, to show the shape. The 2010 meta-analysis by Means, Toyama, Murphy, Bakia, and Jones for the United States Department of Education combined more than a thousand experimental and quasi-experimental comparisons of online and blended learning.

• Aim: measure whether online and blended learning outperform face-to-face instruction
• Method: meta-analysis of controlled comparisons, filtered for rigor
• Sample: over 1,000 effect sizes from studies meeting evidence standards
• Results: blended learning showed a modest advantage; purely online differences were harder to separate from extra learning time and materials
• Gap: little evidence on K-12 settings outside the United States, and almost none from low-connectivity regions

Five lines. That card now supports a sentence in your review, a row in your matrix, and — if the gap matches — the justification of your own study.

How to read a study in fifteen minutes

You cannot afford two hours per paper, and you do not need them. Read in this order. First, the abstract — but only to decide whether the study stays on your desk at all. Second, jump to the methods section and find the sample: who, how many, where, how chosen. Most of a study's limits hide there, and you will write your "gap" line from this section more often than from the conclusion. Third, go to the results tables, not the results prose — tables show the actual numbers, sizes, and significance, while prose rounds them favorably. Fourth, read the final paragraph of the discussion, where authors list their own limitations; they have done half your critical work for you, honestly and in print. Fifteen minutes per paper this way fills one five-point card completely. Thirty papers later you are not someone who skimmed — you are someone who read thirty samples, thirty methods, and thirty gaps, which is exactly the muscle the literature review is built to show.

Building the studies matrix

Before writing the section, build a comparison matrix with one row per study. The matrix forces you to see patterns across studies instead of listing them: which methods repeat, which samples dominate, which results conflict, and which gap survives all the rows. Here is a three-study example from education technology research:

Read the matrix column by column and your review's paragraphs write themselves: one paragraph on what the aims share, one on where methods differ, one on the conflicting results, and one on the gap column — which is your study's front door.

A complete model: presenting three previous studies

Here is the section as it could appear in a real proposal, format you can mirror:

Means, Toyama, Murphy, Bakia, and Jones (2010) conducted a meta-analysis for the United States Department of Education covering more than a thousand controlled comparisons of online, blended, and face-to-face instruction. The analysis found a modest advantage for blended learning, though the authors noted that extra time and materials often accompanied the blended formats. The study drew almost entirely on United States higher education, leaving younger learners and low-connectivity regions outside its reach.

The UNESCO Global Education Monitoring Report (2023) approached the same field from the policy side, reviewing technology use across world regions. It concluded that technology benefits learning when it supports sound pedagogy and wastes resources when it substitutes for it, and it flagged the data gap in developing education systems as a continuing obstacle to honest evaluation.

Hattie (2009), synthesizing more than 800 meta-analyses of student achievement, ranked influences by effect size and placed feedback and teacher clarity among the strongest, while showing that technology's effect varies dramatically with how it is used. Together, these studies establish that the question is no longer whether technology can support learning, but under which classroom conditions — a question none of the three answers for resource-constrained secondary schools.

Three paragraphs, three studies, each with aim, method, result, and limitation, ending in the shared gap. That final sentence is the hinge your whole proposal swings on.

Writing the commentary paragraph after the studies

The paragraph after your studies — some universities call it the critical commentary — is where you step out from behind the citations and speak. A ready pattern:

Reviewing the studies above shows a consistent pattern: the methods matured earlier than the evidence, and the evidence concentrated where research is easiest to run rather than where the problem is largest. All three studies measure what technology does where infrastructure already works; none measures what it does where it does not. This study addresses that opening by examining [your topic] in [your context], using [your method], and thus extends the findings of Means et al. (2010) into the setting their data never reached.

One paragraph. It compares, it evaluates, it names the gap, and it connects the gap to your study by name. If your draft contains nothing like it, your review is a list wearing a review's clothes.

Peter from Manila: trimming forty pages into six

Peter, a master's student in Manila, submitted a literature review of forty pages and got it back with one comment: "Where is your voice in this?" His forty pages summarized ninety studies at four lines each. He rebuilt it in a week using exactly the tools above: he kept the eighteen studies his matrix showed actually spoke to his question, wrote a five-point card for each, grouped them by finding rather than by year, and ended with a commentary paragraph naming the gap. Six pages. The same supervisor called the rewrite "the first draft that reads like a researcher wrote it." The lesson is not that six is magic — it is that analysis scales down and summary does not.

Seven mistakes that weaken a literature review

One: summarizing everything ever written instead of what speaks to the question. Two: organizing by author alphabetically instead of by theme or finding. Three: quoting abstracts verbatim — supervisors recognize abstract prose instantly. Four: citing only sources that agree with you, which turns a review into a campaign. Five: no dates in the text, hiding that the field moved on. Six: writing the review before fixing the research question, then rewriting it forever. Seven: ending on a summary instead of the gap — the last sentence before your methodology must hand the reader your study as the logical next step.

The checklist before you submit

Go down this list against your finished section: every study connects to my research question; each study is summarized in my own words; at least three of the studies are from the last five years; a matrix or grouping exists somewhere behind the prose; conflicting results are acknowledged, not hidden; the final paragraph names the gap explicitly; the gap matches what my methodology actually investigates; citation style follows my university's guide. Eight ticks, and the section is defensible in any meeting.

Where the review fits in your bigger application

The literature review is one block of a larger structure. For the full proposal skeleton, see the master's research proposal template; for doctoral-level expectations, the PhD research proposal guide. When your proposal is ready, the guide on emailing a professor for research supervision and the statement of purpose guide cover the next doors you will knock on, and the APA 7 citation examples guide handles the reference list your review will end with. Programs currently open for application are listed on Truescho opportunities.

If the matrix above still looks like more than you can build alone, the basic research proposal service at https://truescho.com/en/apply-for-me/research-proposal-basic delivers a 2-3 page proposal with research question, objectives, brief methodology, and references — from EUR 50, with first contact within 24 hours.

Frequently asked questions

How many previous studies should a proposal include?

For a master's proposal, eight to fifteen focused studies is the working range; doctoral proposals run higher. Quality of analysis matters more than count — six studies you can defend in a viva beat forty you cannot discuss.

Can I use studies in different languages?

Yes. Summarize them in the proposal's language and keep the original title in the reference list. Mixing Arabic and English sources is a strength in regional research, not a license issue.

How old can a source be?

No absolute limit, but most of your review should draw on the last five to seven years. Classic studies stay — just say why they are still the reference point.

Do websites count as previous studies?

News and blogs are context, not studies. Government statistics, institutional reports like the UNESCO GEM series, and peer-reviewed papers are the layer your review should stand on.

What is the difference between the review in a proposal and in the final thesis?

The proposal review maps the field and justifies the gap; the thesis review does that plus re-reading your own results against the studies you cited. Start lean — you can always widen it later, and you will.

Should every study get its own paragraph?

Group studies by finding or theme, not one-paragraph-each. Two or three studies per paragraph, compared against each other, reads like analysis; one study per paragraph reads like an inventory.

Sources

• Wikipedia, literature review definition and purpose: https://en.wikipedia.org/wiki/Literature_review
• Google Scholar, academic search: https://scholar.google.com
• Shamaa, Arabic education research network: https://shamaa.org
• CORE, open-access research aggregator: https://core.ac.uk
• Internet Archive, scanned theses and books: https://archive.org

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