How to Write a Strong Research Question for Your Dissertation

A weak research question makes everything harder — your literature review, methodology and analysis all suffer. A strong one makes your entire dissertation easier to write. Your research question is the foundation of your entire dissertation. Get it right and everything else — your literature review, methodology, analysis and conclusion — falls into place. Get it wrong and you will struggle at every stage. This guide shows you exactly how to write a research question that is focused, feasible and academically rigorous.

What Makes a Good Research Question?

A strong research question should be: Focused — specific enough to be answered within your word count and timeframe; Feasible — researchable with available data and resources; Original — addressing a genuine gap in the literature; Significant — worth answering for academic or practical reasons; Clear — unambiguous and precisely worded.

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Types of Research Questions

• Descriptive: What is the prevalence of X among Y?
• Comparative: How does X differ between Group A and Group B?
• Causal/Explanatory: What is the effect of X on Y?
• Evaluative: How effective is X in achieving Y?
• Exploratory: What are the experiences of X among Y?

Step-by-Step: Writing Your Research Question

1. Choose a broad topic area

Start with a subject you are genuinely interested in — you will be spending months with it. Review your course content, identify debates that interest you and scan recent journal articles for emerging themes.

2. Review the existing literature

Before finalising your question, conduct a preliminary literature review. Identify what has already been studied and where the gaps are. Your research question should address one of those gaps.

3. Narrow your focus

Most students start with a question that is far too broad. Narrow it by specifying: the population (who?), the context (where? when?), the variable (what?), and the relationship (how? why?).

4. Test your question

Ask yourself: Can this be answered with available data? Is it too simple to require a dissertation? Does it raise ethical concerns? Is it genuinely unanswered in the literature?

The PICO Framework (Health Sciences)

For health, nursing and medical dissertations, the PICO framework helps structure your research question: Population, Intervention, Comparison, Outcome.

Good vs Bad Examples

❌ Too broad:

✅ Focused and specific:

❌ Too narrow (already answered):

✅ Addresses a genuine gap:

Research Aims and Objectives

Once you have your research question, you need to write your research aims and objectives. Your aim is the overarching purpose of your study — what you want to achieve. Your objectives are the specific steps you will take to achieve that aim. Objectives should be SMART: Specific, Measurable, Achievable, Relevant, Time-bound.

FAQs

How many research questions should a dissertation have?

Most dissertations have one primary research question and two to four sub-questions or objectives. Too many questions dilute your focus.

Can I change my research question after starting?

Yes — especially after your literature review reveals unexpected gaps. Always discuss changes with your supervisor before proceeding.

What's the difference between a research question and a hypothesis?

A research question is open-ended and exploratory — it asks something you intend to investigate. A hypothesis is a specific, testable prediction about the relationship between variables, usually used in quantitative studies. Not all research questions require a hypothesis; qualitative and exploratory research often uses questions alone.

How specific should a research question be?

Specific enough that another researcher reading it would understand exactly what population, context and variables you are studying — but not so narrow that it has already been definitively answered elsewhere. If your question could apply to any topic in your field, it is too broad.

What makes a research question "feasible"?

Feasibility means you can realistically answer the question with the time, data access, sample size, budget and skills available to you as a student — not just that the question is interesting. A fascinating question you cannot actually research within your timeframe will derail your dissertation, regardless of its academic merit.