Nursing dissertation research gap identification is the stage where a broad topic becomes a focused research problem. A gap explains what current evidence does not answer well enough and shows why further investigation, synthesis or analysis is justified.
This guide explains how to find a nursing dissertation research gap, test whether it is genuine and translate it into a research question that can be answered within a nursing dissertation.
Nursing dissertation research gap: key takeaways
- A research gap is a specific uncertainty, not simply a broad topic.
- Look for patterns across several relevant studies.
- Common gaps involve methods, populations, settings, implementation and inconsistent findings.
- The uncertainty should matter to nursing and be feasible to investigate.
- The research question and methodology must address the gap directly.
What is a nursing dissertation research gap?
A nursing dissertation research gap is an area of uncertainty that emerges after relevant literature has been examined. It sits between what the evidence already establishes and what the dissertation seeks to clarify.
In established nursing topics, a gap rarely means that nobody has ever studied the subject. More often, it involves inconsistent findings, weak designs, under-represented populations, limited settings, uncertain mechanisms or difficulties translating evidence into practice.
Feak and Swales’s Telling a Research Story: Writing a Literature Review explains how literature reviews establish a research space by organising prior work and identifying gaps and needs (Feak & Swales, 2009). The gap should therefore grow from critical reading rather than being invented after a preferred question has already been chosen.
How to recognise a strong nursing dissertation research gap
| Weak statement | Stronger statement |
|---|---|
| There is little research on nurse burnout. | Most studies of burnout and intention to leave use cross-sectional designs and different measures. This limits comparison and temporal interpretation. |
| More research is needed on diabetes education. | Nurse-led diabetes education varies in content, intensity and follow-up, leaving uncertainty about which components are most consistently linked with benefit. |
| There is a gap in transition support. | Formal preceptorship is widely studied, but less is known about how newly qualified nurses experience informal ward support. |
A strong gap statement usually does two things: it identifies what the evidence already suggests and then names the precise uncertainty that remains.
Seven types of nursing dissertation research gap
1. Evidence gap
An evidence gap exists when an important part of a problem has received limited direct study. Digital medication research, for example, may focus on adoption rates while giving less attention to nurses’ workflow experiences.
2. Methodological gap
A methodological gap occurs when the designs used so far cannot answer an important part of the question well. Cross-sectional studies can identify associations but cannot establish temporal direction.
3. Population gap
A population gap appears when relevant groups are under-represented. Research on transition to practice may contain substantial evidence about adult nurses but fewer studies focused specifically on mental health nurses.
4. Setting gap
An issue may be well studied in acute hospitals but less understood in community, residential or primary-care settings. The setting difference should have a credible reason to affect practice, exposure or outcome.
5. Inconsistency gap
Studies sometimes produce findings that appear to conflict. The useful question is not merely whether they disagree, but whether differences in populations, measures, interventions or analyses explain that variation.
6. Implementation gap
An intervention may show benefit under research conditions yet remain difficult to use in routine care. Workload, training, resources, local culture or patient acceptability can create an implementation gap.
7. Synthesis gap
Many primary studies may exist while the overall evidence remains fragmented. A focused review can add value when a transparent synthesis is needed to clarify patterns, quality and uncertainty.
How to find a nursing dissertation research gap
Narrow the topic before searching deeply
Reduce a broad area such as “mental health nursing” by population, phenomenon, outcome and setting.
Broad: Nurse burnout.
Focused: Burnout and intention to leave among registered nurses in acute hospitals.
Map the recent evidence
Read recent reviews and relevant primary studies, then create an evidence map containing population, setting, design, sample, measures, findings and limitations. Patterns become easier to see when studies are compared systematically rather than remembered individually.
Compare limitations across studies
One paper’s limitation does not automatically become a dissertation gap. Look for a repeated problem. Consistent use of single-site samples, short follow-up or incompatible measures may indicate a more defensible methodological uncertainty.
Investigate contradictory findings
When studies disagree, compare what differs between them. Populations, intervention intensity, measurement instruments and analytical methods may explain the variation. A useful gap identifies the source of uncertainty as precisely as the evidence allows.
Check nursing relevance
The uncertainty should matter to nursing practice, education, patient safety, workforce planning, service delivery or future research. A gap may be academically interesting yet poorly suited to a nursing dissertation if the nursing contribution cannot be explained.
Test feasibility
A genuine gap can still be unsuitable for a student project. Check whether the evidence, population, dataset, approvals, analytical skills and time needed are realistic. A smaller answerable gap is stronger than a large unresolved problem that cannot be studied rigorously.
Using systematic reviews to find a nursing dissertation research gap
Recent systematic reviews are useful because they summarise a body of evidence and often reveal repeated methodological weaknesses. Read the results and limitations rather than relying only on the authors’ final recommendation.
Search forward from the review to check whether newer studies have already addressed the proposed gap. A recommendation from several years ago may no longer represent a current uncertainty.
Using primary studies to refine the gap
Primary studies show how researchers have actually investigated the problem. Compare samples, measures, settings, follow-up and analytical choices.
One study may measure “intention to leave” using a single item while another uses a validated multi-item scale. That methodological difference may help explain why effect estimates are not directly comparable.
Nursing dissertation research gap example: burnout
Weak:
There is a research gap on nurse burnout, so more research is needed.
Stronger:
Existing studies generally report a positive relationship between burnout and intention to leave among hospital nurses. However, the evidence is dominated by cross-sectional designs and different burnout measures. Direct comparison remains difficult, and uncertainty persists about the independent role of burnout after organisational factors are considered.
Nursing dissertation research gap example: qualitative research
Formal preceptorship is widely discussed as a way to support newly qualified nurses. Programme descriptions do not fully explain how nurses experience support during daily ward practice, and existing qualitative evidence suggests that team accessibility and workload may shape transition. A focused synthesis could therefore clarify how formal and informal support interact.
Nursing dissertation research gap example: intervention research
Nurse-led diabetes education is linked with improvement in some self-management outcomes, but interventions vary in duration, content and delivery. This variation makes it difficult to identify which components are most consistently associated with benefit.
Research gap versus research problem
| Element | Example |
|---|---|
| Problem | Nurse turnover threatens workforce stability. |
| Existing evidence | Burnout is often associated with intention to leave. |
| Gap | Different measures and cross-sectional designs limit interpretation. |
| Question | What does current evidence show about burnout and intention to leave among hospital nurses? |
For a dedicated guide, see how to write a nursing research problem statement.
Research gaps versus future-research recommendations
Authors often recommend future research, but those recommendations are not automatically suitable dissertation gaps. A later study may already have addressed the issue, the recommendation may be too broad, or it may require resources beyond a student project.
Use a recommendation as a lead, then verify the current evidence independently.
Turn the research gap into a research question
The research question should address the uncertainty directly and preserve the same population, concepts and scope.
Gap: Studies use different measures and report inconsistent associations between burnout and intention to leave.
Question: What is the association between nurse burnout and intention to leave among hospital nurses?
Gap: Limited understanding exists of informal ward support during transition.
Question: How do newly qualified nurses experience formal and informal support during their first year of acute-care practice?
For question frameworks, see how to formulate a nursing research question.
How the research gap connects to methodology
The selected method must be capable of addressing the uncertainty. A question about lived experience may require qualitative research, while a question about association may require quantitative analysis. If many scattered studies already exist, an evidence synthesis may be more useful than collecting a small new sample.
Move through the logic in this order: problem, existing evidence, gap, question and method. If the method cannot answer the gap, the project needs redesign rather than additional wording.
How to write the research gap in the introduction
A useful pattern is:
What is known → what is uncertain → why it matters → what the dissertation will do.
For example:
Burnout is often associated with nurses’ intention to leave. Study-design and measurement differences limit comparison, creating uncertainty about the strength and independence of that relationship. Clarifying the evidence matters for workforce-retention planning. This dissertation reviews contemporary evidence on burnout and intention to leave among hospital nurses.
Our nursing dissertation introduction examples show how this reasoning can be integrated into Chapter 1.
Using cautious language for a nursing dissertation research gap
Avoid absolute claims unless a comprehensive search genuinely supports them. Phrases such as “no research exists” are particularly risky because one missed study can undermine the statement.
The University of Manchester Academic Phrasebank provides cautious alternatives such as “evidence remains limited,” “findings are inconsistent” and “less is known about” (University of Manchester, n.d.). Use them only when they describe the literature accurately.
Common nursing dissertation research gap mistakes
- Claiming that no research exists after a limited search.
- Treating every study limitation as a research gap.
- Relying on one author’s future-research recommendation without checking newer evidence.
- Choosing an uncertainty that is too large for the available time and word count.
- Using outdated literature to justify a supposedly current gap.
- Calling conflicting findings a gap without investigating why they differ.
- Selecting a method that cannot address the identified uncertainty.
Nursing dissertation research gap FAQs
Does a dissertation need a completely original topic?
No. Originality can come from the population, setting, method, synthesis, application or interpretation rather than an entirely untouched subject.
Can a systematic review have a research gap?
Yes. The gap may involve inconsistent evidence, methodological weaknesses, under-represented populations or the need for an updated synthesis.
How many sources should support the gap?
There is no fixed number. What matters is whether a sufficiently broad and current examination of the evidence demonstrates the uncertainty convincingly.
Where should the research gap appear?
Introduce it briefly in Chapter 1 and demonstrate it more fully in the literature review.
Final nursing dissertation research gap checklist
- The proposed gap is based on current literature.
- The dissertation states what is already known before describing uncertainty.
- The remaining uncertainty is specific rather than generic.
- The gap has a clear reason to matter to nursing.
- The project can address it with available evidence, access and time.
- The research question and method follow directly from the gap.
A defensible nursing dissertation research gap comes from critical comparison of evidence. Once identified, it should guide the research question, methodology and final contribution.
For support with topic refinement, research questions and methodology, explore our nursing dissertation support services.
Related Nursing Guides
- How to Choose a Nursing Dissertation Methodology: Design Decision Guide
- How to Fix a Weak Nursing Dissertation Discussion Chapter
- How to Write a Hypothesis in a Nursing Dissertation: Examples and Step-by-Step Guide
Conclusion
A defensible nursing dissertation research gap must emerge from critical comparison of current evidence rather than from a claim that no studies exist. The final gap statement should identify what remains uncertain, explain why it matters to nursing and lead directly to the research aim.
References
- Feak, C. B., & Swales, J. M. (2009). Telling a research story: Writing a literature review. University of Michigan Press. https://doi.org/10.3998/mpub.309338
- University of Manchester. (n.d.). Academic Phrasebank. https://www.phrasebank.manchester.ac.uk/
