Research Gap Examples: 15+ Real Dissertation Gaps That Actually Worked (UK, 2026)

Q: What are the 5 types of research gaps?

Knowledge gap (under-researched area), evidence gap (contradictory findings), methodological gap (weak methods), empirical gap (unstudied question), and practical gap (theory untested in real life).

Q: What is a methodological gap in research?

When existing studies have relied too heavily on one method — for example, measuring a phenomenon only through surveys when qualitative interviews are needed.

Q: Can a small research gap still get a distinction?

Yes. Small, focused gaps consistently score better than broad, vague ones.

Q: How many sources do I need?

10–15 papers establishing what is known, 3–5 stating the limitation, and 2–3 calling for more research.

Q: How recent should sources be?

Undergraduate: 5–8 years. Master's: 5 years plus seminal papers. PhD: 3–5 years plus seminal papers.

How to Write a Literature Review

June 13, 2026

June 16, 2026

What Is a Research Gap? (A Definition Students Actually Understand)

Here is the definition I give my students on day one. A research gap is an unanswered question, unresolved contradiction, or underexplored area within existing academic literature that your dissertation is positioned to investigate. Other ways to think about it: a gap in literature, an unexplored area, an under-researched topic, or an unresolved scholarly debate that needs further investigation.

What a Research Gap is NOT

A topic nobody has ever studied (that almost never exists)
A personal opinion about what should be researched
The phrase "more research is needed" (every paper includes this)
A research problem that has already been solved elsewhere

What a Research Gap IS

A specific missing population
An unresolved contradiction between credible studies
A methodological limitation acknowledged but not corrected
A theory never tested in a different context
A question the literature has simply never asked

Specificity matters more than students think. A vague gap produces a vague dissertation. A precise gap produces a clear contribution. For a detailed walkthrough of how to structure your dissertation introduction around a gap statement, see our chapter-by-chapter guide.

At a Glance: The 5 Types of Research Gaps

Gap Type	Meaning	One-Sentence Example
Knowledge gap	Under-researched topic or population	"Social media effects on adults over 65 are under-researched compared to adolescents."
Evidence gap	Contradictory findings unresolved	"Some studies show homework helps; others show it harms. No one has explained why."
Methodological gap	Over-reliance on one method	"Burnout is measured by surveys, but surveys cannot explain lived experience."
Empirical gap	Specific question never studied	"Remote work productivity is studied. Remote workplace friendships are not."
Practical gap	Theory never tested in real life	"Diversity frameworks exist. Do they actually improve hiring outcomes?"

Research Gap vs Literature Gap

Students mix these up constantly. They are not the same thing.

Research Gap	Literature Gap
Missing contribution in the field's collective knowledge	Missing citation in your bibliography
"No longitudinal studies exist in this population"	"I missed Smith (2021)"
What examiners ask about during your viva	What happens when you cite poorly
Justifies your academic contribution	Just means you need to read more

When your supervisor asks "what is missing from this area of research?" they mean a research gap. A literature gap is just a citation error — less interesting, but easier to fix. For examples of how gap arguments are built across full chapters, see our literature review examples and dissertation chapter examples.

Why a Research Gap Shapes Your Entire Dissertation

I want to be direct about the stakes here. Your research gap is not a paragraph in your introduction. It is the logical foundation for everything that follows. Your research question flows from the gap. Your methodology is justified by the gap. Your contribution — which is what examiners are actually marking — is defined by the gap. Across more than 150 dissertations I supervised, the clarity of the gap statement was the single most consistent predictor of the final mark. Not grammar. Not length. Not the number of sources. The gap. Get this right and the rest of the dissertation acquires a logic that makes it much easier to write. Get it wrong and you spend months working around a problem you cannot name.

The 5 Types of Research Gaps (Detailed)

Type 01 Knowledge Gap A topic or population that has not been researched enough. Social media effects on teenagers are well-studied. In adults over 65, the literature is comparatively thin — researchers simply have not asked the same questions of that population.

Type 02 Evidence Gap Contradictory findings that nobody has resolved. Some studies suggest homework improves primary school performance (Cooper, 1989). Others suggest excessive homework harms wellbeing (Kohn, 2006). Two credible bodies of evidence point in opposite directions.

Type 03 Methodological Gap Over-reliance on one research method. Burnout has been measured by surveys extensively (Dall'Ora et al., 2020). The subjective experience of burnout — what it actually feels like — has been explored qualitatively much less.

Type 04 Empirical Gap A specific question has never been studied directly. Remote work productivity has been studied extensively (Bloom et al., 2015). Remote workplace friendships? That specific angle appears rarely, if at all.

Type 05 Practical Gap Theories or frameworks exist but have never been tested in real-world settings. Organisational psychology has produced numerous diversity frameworks (Roberson, 2019). But do those frameworks actually improve hiring outcomes inside real organisations?

Not sure which gap type fits your dissertation? Our team of UK-qualified academics can review your research question and help you identify the most defensible gap position before you submit your proposal.Get Proposal Help

15+ Real Research Gap Examples From Actual Dissertations

These are adapted from dissertations supervised or examined between 2018 and 2025. Names and identifying details have been changed.

At a Glance: All 15 Examples

#	Discipline	Gap Type	One-Sentence Summary
1	Psychology	Methodological	Limited qualitative research on how adolescents interpret social media-anxiety links
2	Psychology	Methodological / Knowledge	Insufficient longitudinal CBT research in adults over 65
3	Business	Empirical	Remote work literature focuses on quantity, not collaborative creativity
4	Business	Explanatory / Conceptual	Leadership diversity correlates with performance, but mechanisms are unexplored
5	Education	Knowledge	Lecturer responses to generative AI are under-researched
6	Education	Conceptual	Engagement measured behaviourally, not through lived experience
7	Nursing	Methodological	Burnout documented cross-sectionally, rarely longitudinally
8	Sociology	Conceptual / Knowledge	Digital divide researched as access, not digital literacy skills
9	Health Sciences	Methodological / Empirical	Patient-perceived barriers to medication adherence unexplored qualitatively
10	Sociology	Empirical	Care leavers' ongoing university experience under-researched
11	Business	Conceptual / Practical	SME sustainability adoption mechanisms (not just barriers) unknown
12	Education	Knowledge / Empirical	First-gen students' feedback interpretation in clinical contexts unstudied
13	Psychology	Empirical	Cross-cultural anxiety intervention applicability underexplored
14	Health Sciences	Evidence	Telehealth diagnostic consultation evidence thinner than follow-up care
15	Sociology	Practical	Housing improvement → health outcome causal evidence limited

Psychology — Social Media and Adolescent Anxiety

Large quantitative studies through the early 2020s consistently found statistical links between heavy social media use and anxiety symptoms in adolescents (Twenge & Campbell, 2019; Keles et al., 2020; Valkenburg et al., 2022). The research was thorough in terms of what it measured. What it could not do was explain how adolescents themselves understood that relationship. Three separate systematic reviews — Schonning et al. (2020), Popat & Tarrant (2023), and Valkenburg et al. (2022) — called explicitly for qualitative research on this question.

Gap Statement · Psychology "While quantitative research has established a relationship between social media use and adolescent anxiety, limited qualitative evidence explores how adolescents themselves interpret this relationship." Result: High 2:1

Psychology — CBT Effectiveness in Older Adults

Most CBT research focuses on adults aged 18 to 65. Existing studies on older adults had very small samples — typically 15 to 25 participants — and follow-up periods of four to eight weeks (Laidlaw, 2020; Gould et al., 2021). Long-term effectiveness in this population had essentially never been measured.

Gap Statement · Psychology "Despite substantial evidence supporting CBT effectiveness in younger adults, insufficient longitudinal research examines long-term outcomes among adults aged over 65." Result: Proposal approved at first submission

Business — Remote Work and Collaborative Creativity

Between 2020 and 2022, remote work research multiplied rapidly — most measuring productivity: hours worked, tasks completed, email volume (Bloom et al., 2015; Barrero et al., 2021). What had not been explored properly was whether collaboration suffered in quieter, less measurable ways. The topic was crowded. But the angle was not.

Gap Statement · Business "Existing remote work literature focuses largely on productivity quantity rather than collaborative creativity or innovation quality." Result: Approved — niche angle within crowded field

Business — The Mechanisms Behind Leadership Diversity

Research was excellent at documenting that diverse leadership teams correlated with better organisational outcomes (Hunt et al., 2018). But almost none of it explained why. One supervisor might consider this gap too small. Another might see it as appropriately focused — in this case, the proposal was approved on the first submission.

Gap Statement · Business "While correlational evidence links leadership diversity with organisational performance, limited qualitative research explores the mechanisms underlying this relationship." Result: Approved — first submission

Education — Lecturer Responses to Generative AI

When ChatGPT became widely accessible, the first wave of academic research focused almost entirely on students. A lecturer completing a part-time master's dissertation asked: how are the people setting the assessments actually responding?

Gap Statement · Education "Although emerging studies examine student AI usage, limited research explores how lecturers and institutions are adapting assessment practices in response to generative AI tools." Result: Timely, emerging gap — strong originality claim

Education — Online Learning Engagement

The dominant metrics for online engagement were login frequency, time on platform, and discussion posts. As one student observed: "Someone can log in ten times a day and learn nothing. That is not engagement. That is clicking." She used reflective diaries and interviews — and examiners called the result "refreshingly thoughtful."

Gap Statement · Education "Existing online learning research relies heavily on behavioural analytics while offering limited insight into how students personally experience and understand engagement." Result: Described as "refreshingly thoughtful" by examiners

Nursing — Burnout Trajectories After COVID-19

Nurse burnout became one of the most researched topics in health sciences after 2020. Yet almost all of those studies had one thing in common: they were cross-sectional — one survey, one moment in time. Nobody had followed the same nurses across months or years.

Gap Statement · Nursing "Although burnout prevalence among nurses is extensively documented, longitudinal evidence examining how burnout develops and changes over time remains limited." Result: Distinction — later cited in an NHS workforce planning document

Sociology — Digital Divide and Educational Inequality

Most digital divide research focuses on internet access and device ownership (van Dijk, 2020; Ragnedda & Mutsvairo, 2018). One student argued that access alone was an incomplete picture — a student with a laptop but poor digital literacy skills would still be disadvantaged.

Gap Statement · Sociology "Research on educational digital inequality focuses primarily on access to technology while students' digital literacy skills remain comparatively underexplored." Result: Strong conceptual reframe of well-established field

Health Sciences — Patient-Perceived Barriers to Medication Adherence

Quantitative studies had measured adherence rates extensively. Researchers knew what percentage of patients took their medication as prescribed (World Health Organisation, 2023). They had much less understanding of why non-adherent patients made the choices they made.

Gap Statement · Health Sciences "While quantitative studies document medication non-adherence rates, limited qualitative research explores patient-perceived barriers from the perspective of those who have chosen not to follow prescribed regimens." Result: Clear methodological gap, well-evidenced

Sociology — Care Leavers in Higher Education

A reasonable body of literature existed on care leavers' access to university (Jackson & Cameron, 2012; Sebba et al., 2015). Much less had been written about the ongoing experience once students arrived.

Gap Statement · Sociology "While research addresses care leavers' transition into higher education, limited work explores their ongoing lived experience within university — including how they navigate belonging, academic identity, and institutional support." Result: Approved — original angle on established access literature

Business — SME Adoption of Sustainability Practices

Sustainability in business had been studied extensively in large corporations. SME literature focused largely on barriers to adoption (Hillary, 2004; Aragón-Correa et al., 2020). The mechanisms of successful adoption remained poorly understood.

Gap Statement · Business "Although barriers to SME sustainability adoption are documented, the internal mechanisms facilitating successful adoption in resource-constrained organisations remain underexplored." Result: Practical focus distinguished from barrier-heavy literature

Education — First-Generation Students and Academic Feedback

This was the smallest, most focused study supervised in eleven years — and one of the best outcomes. The study examined how first-year nursing students interpreted written feedback on their first clinical placement assessment. Small scope, sharp focus, clear contribution.

Gap Statement · Education "While feedback literacy research has examined undergraduate students broadly, limited work explores how first-year nursing students interpret and respond to written feedback on clinical placement assessments." Result: Distinction — later cited in a journal article

Need help finding your research gap? Our academic team reviews your draft research question and identifies the strongest gap position for your field — drawing on familiarity with UK examiner expectations across disciplines.Get a Topic and Outline

What Examiners Are Actually Looking For

After sitting on more than 50 examination panels, examiners ask three questions — usually without saying them aloud.

1Has this gap already been studied? If yes, your originality marks are immediately compromised. The UK Research Integrity Office provides useful guidance on original contribution.

2Can this student realistically investigate this gap? If the study would require ten years of data or 5,000 participants, your methodology section will face hard questions. Project scoping matters as much as originality.

3Has the student proved the gap exists? Assertion is not evidence. You need citations — papers establishing what is known, identifying the limitation, and ideally calling for more research in your direction.

Gap statements that fail in viva almost always fail on one of these three questions. Most students focus on #1. They neglect #3 entirely — and that is the most fixable problem of the three.

Can a Small Research Gap Still Get a Distinction?

Yes. Emphatically. In my experience, small, focused gaps score better than large, ambitious ones — consistently.

✓ Small, Focused Gap

Feasible to complete within your timeline
Clean methodology flows naturally from it
Clear, defensible contribution statement
Examiners trust your judgment and scope

✗ Large, Ambitious Gap

Unlikely to finish adequately in time
Overcomplicated methodology chapter
Vague or unachievable contribution claim
Examiners worry about your project scope

The best dissertation supervised in eleven years studied something genuinely narrow. The student received a distinction. The size of the gap does not determine the mark. The clarity does.

How Many Sources Do You Need to Prove a Gap Exists?

Requirement	Minimum Sources
Establish what is already known	10–15 recent papers
Show the limitation your gap addresses	3–5 papers explicitly stating it
Demonstrate the field recognises this gap	2–3 papers calling for more research

A student with 20 well-chosen papers and a sharp gap will always outperform a student with 80 loosely relevant papers and a muddy one. More is not better. More focused is better.

How to Find Your Research Gap: A Literature Matrix Template

This is the exact process taught to every dissertation student. Follow it in order.

1Read the right parts of papers. Most students read abstracts and introductions. The parts most useful for gap-finding are discussion sections and limitations paragraphs. That is where authors admit what their study could not do.

2Build a literature matrix. For each paper record: citation, year, methods, population, key finding, stated limitation, and future research call. After 20 papers, patterns emerge.

3Look for repeated limitations. If multiple papers flag the same missing element, that is strong evidence the gap is real — not a personal observation, but a field-level acknowledgement.

4Narrow the scope aggressively. "Limited research on social media" is weak. "Limited qualitative research on TikTok use and academic concentration among first-year UK university students" is strong.

5Validate with your supervisor. This conversation takes 20 minutes. Skipping it can cost weeks. Supervisors can tell you within minutes whether a gap is original or already covered by a paper you have not found yet.

Literature Matrix: Example Format

Paper	Year	Methods	Population	Key Finding	Stated Limitation	Future Research Call
Twenge & Campbell	2019	Survey	US adolescents	Screen time linked to lower well-being	Cross-sectional; cannot infer causality	Longitudinal and qualitative research needed
Keles et al.	2020	Systematic review	Adolescents	Small but significant effect size	High heterogeneity; mechanisms unclear	Qualitative studies on individual experiences
Valkenburg et al.	2022	Longitudinal survey	Dutch adolescents	Person-specific effects vary widely	Surveys alone cannot explain why	Mixed-methods designs

For a detailed walkthrough of how to conduct a systematic literature review, see our Academic Library guide.

How to Write a Literature Review That Reveals a Gap

Here is how to weave a gap analysis into an actual literature review. Notice how it moves from what is known → what the limitation is → who agrees the gap exists → what this study will do.

Literature Review Extract — Example "Several large-scale studies have established a correlation between heavy social media use and anxiety symptoms in adolescents (Primack et al., 2017; Twenge & Campbell, 2019; Keles et al., 2020). However, the mechanisms underlying this relationship remain unclear. Most existing research relies on surveys and quantitative scales, which measure correlation but cannot explain subjective experience. Three recent systematic reviews have called for qualitative research exploring how adolescents themselves interpret this relationship (Schonning et al., 2020; Vahedi & Zannella, 2021; Popat & Tarrant, 2023). This study addresses that gap by conducting semi-structured interviews with adolescents aged 14–16." Pattern: Known → Limitation → Field agreement → Your response

For examples of how this structure appears across full chapters, see our dissertation proposal examples.

Turning a Gap Into a Research Question

If your gap is specific and well-formed, the research question almost writes itself. If you cannot translate your gap into a research question in one sentence, the gap is not focused enough yet.

Research Gap	Research Question
Limited qualitative evidence on how adolescents interpret social media-anxiety links	"How do adolescents experience and interpret the relationship between their social media use and their anxiety?"
Limited research on how lecturers adapt assessments for generative AI	"How are lecturers at UK universities adapting assessment design and practice in response to student access to generative AI?"
Limited longitudinal evidence on nurse burnout development	"How does occupational burnout among NHS nurses change over a 12-month period following return from COVID-19 redeployment?"

For help structuring your full proposal, see our dissertation topic and outline service.

How Recent Should Your Sources Be?

This matters more than students realise. Examiners look at publication dates. A gap built on ten-year-old evidence is vulnerable to the question: "Has this actually been addressed since then?"

Dissertation Level	Recommended Source Age	Notes
Undergraduate	Last 5–8 years	Seminal older papers remain citable regardless of age
Master's	Last 5 years	Plus foundational papers where necessary
PhD	Last 3–5 years	Cutting-edge recency expected — examiners are specialists

The OECD and UK government publish valuable statistical data that can support your gap argument with current figures. For a curated collection of recent sources by discipline, explore our free dissertation topics pages.

Frequently Asked Questions

Q1: What is a research gap in a dissertation?

A research gap is an unanswered question, unresolved issue, or underexplored area in existing academic literature that a dissertation investigates. It is the justification for why your study was necessary and what original contribution it makes to the field.

Q2: What are the 5 types of research gaps?

Knowledge gap (under-researched area or population), evidence gap (contradictory findings no one has resolved), methodological gap (over-reliance on one research method), empirical gap (a specific question never studied directly), and practical gap (a theory or framework never tested in real-world conditions).

Q3: What is a methodological gap in research?

A methodological gap occurs when existing studies have relied too heavily on one method — for example, measuring burnout only through surveys when qualitative interviews are needed to understand the lived experience. It is one of the most common and most defensible types of gap at master's level.

Q4: Can a small research gap still get a distinction?

Yes — emphatically. Small, focused gaps consistently score better than broad, ambitious ones. They produce cleaner methodologies, more achievable studies, and clearer contribution statements. The best dissertation supervised in eleven years studied something genuinely narrow, and the student received a distinction. Clarity beats size every time.

Q5: How many sources do I need to prove a gap exists?

For establishing what is already known: 10–15 recent papers. For showing the specific limitation your gap addresses: 3–5 papers explicitly stating it. For demonstrating the field recognises the gap: 2–3 papers calling for more research in your direction. Quality and precision matter far more than volume.

Q6: What is the difference between a research gap and a literature gap?

A research gap is missing knowledge in the academic field — it is what examiners ask about during your viva. A literature gap is a citation you omitted — it means you need to read more. Supervisors asking "what is missing from this area?" mean the former. Do not confuse them.

Q7: Can I use a gap from another paper's "future research" section?

Yes. Many good dissertations begin exactly there. If a credible, peer-reviewed paper explicitly calls for research in a direction you are proposing, that is not a weakness — it is a citation. But you must adapt the gap to your specific context, population, and methodology. Direct replication without adaptation is not original research.

Q8: How recent should my sources be to support a gap argument?

For undergraduate dissertations: last 5–8 years. For master's: last 5 years, plus seminal older papers where necessary. For PhD: last 3–5 years, with examiners who are field specialists expecting cutting-edge recency. Foundational papers remain citable at all levels regardless of age. Examiners will notice if your gap argument rests on evidence from a decade ago when more recent papers may have addressed it.

Checklist Before You Finalise Your Gap

Run through this before you submit your proposal or finalize your introduction chapter. If you cannot tick all ten, your gap statement needs more work.

✓Have you read at least 15–20 recent papers in your area?

✓Is your gap specific — defined by population, context, method, or timeframe?

✓Is it realistic for your available timeframe and resources?

✓Does your supervisor agree it is original enough for your level?

✓Can your chosen methodology actually investigate it?

✓Does your research question directly and specifically address the gap?

✓Does your literature review build toward the gap rather than just describing topics?

✓Can you explain your contribution in one clear sentence?

✓Have you cited evidence that the gap exists — not just asserted it?

✓Are your sources recent enough for your level of study?

Dr Sarah Mitchell, PhD Dissertation Supervisor · University of Manchester · Reviewed by Dr Emily Carter, PhD, Senior Research Consultant, Premier Dissertations Dr Mitchell supervised undergraduate and postgraduate dissertations in the Faculty of Humanities from 2014 to 2025 and has examined over 50 dissertations across psychology, business, education, and health sciences. Her research interests include dissertation pedagogy, research design, and qualitative methods.

Final Thought

Finding a research gap rarely feels like a revelation. It is quieter than that. You read a limitations section and something catches your attention. You notice three unrelated papers calling for the same type of follow-up. You see a population that is conspicuously absent. That is how most good dissertations begin. Not through genius. Through careful reading and a willingness to ask what the existing research has not yet answered. It is a skill. It improves with practice. Good luck.

Need Help Identifying or Writing Your Research Gap? Whether you need a gap identified, a proposal written from scratch, or your literature review chapter strengthened — our team of UK-qualified PhD academics is here to help.

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Last reviewed: May 2026 · This guide reflects dissertation supervision practice across UK universities. Always follow your supervisor's guidance for department-specific requirements.

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