Dissertation Methodology Chapter: How to Write It and What to Include

The methodology chapter has a simple job that students often miss: it does not just describe what you did, it explains why that was the right way to answer your question. Examiners read it to judge whether your findings can be trusted. If the method is weak or poorly explained, even interesting results lose their value.

This guide takes a section-by-section approach. For each part of the chapter, it says what to include and shows example wording. If you want a step-by-step overview first, read How to Write a Dissertation Methodology Chapter.

The Principle: Describe, Then Justify

For each decision, follow a three-part pattern:

1. What you did.
2. Why you did it, in relation to your research question.
3. What its limitations are, and how you addressed them.

Description alone reads like a lab report. Justification is what turns it into an argument.

Description only: Interviews were conducted with ten teachers.

Description and justification: Semi-structured interviews were used because the study aims to understand how teachers interpret the new curriculum, which requires participants to explain their reasoning in their own words. Ten teachers were interviewed, a number chosen to provide variety in experience while allowing in-depth analysis within the time available.

Section 1: Introduction and Restating the Question

Open by restating your research question and briefly outlining the chapter. This reminds the reader what the method must answer. Two or three sentences are enough.

Section 2: Research Philosophy and Approach

Many departments expect you to state your underlying view of knowledge. In simple terms:

• A positivist approach assumes that reality can be measured objectively, and it usually leads to quantitative methods.
• An interpretivist approach assumes that people construct meaning, and it usually leads to qualitative methods.
• A pragmatic approach chooses methods according to what best answers the question, and it often uses mixed methods.

Not every discipline requires this section, and undergraduate dissertations may need only a sentence or two. Check what your department expects.

Section 3: Research Design

Explain the overall plan for your study. Common designs include:

• Surveys and cross-sectional studies.
• Experiments and quasi-experiments.
• Case studies.
• Ethnography.
• Longitudinal studies.
• Systematic reviews.

State your design and explain why it suits the question. If you considered another design and rejected it, say why. That shows you made a deliberate choice.

Section 4: Participants and Sampling

Describe who took part (or what data you used) and how you selected them.

• Population: the group you want to learn about.
• Sample: the people or items you actually studied.
• Sampling method: random, stratified, convenience, purposive, or snowball.
• Size: how many, and why that number.
• Inclusion and exclusion criteria.

Be honest about limits. A convenience sample of 80 students from one campus cannot represent all students, and saying so honestly is better than implying otherwise.

Example wording: A purposive sample of twelve final-year nursing students was recruited through the department mailing list. Participants were selected because they had completed at least one clinical placement, allowing them to draw on practical experience.

Section 5: Data Collection

For each method, explain what you used, how you used it, and why.

• For a questionnaire: how it was designed, what scales it used, whether it was piloted, and how it was distributed. See designing a dissertation questionnaire.
• For interviews: the type (structured, semi-structured, unstructured), the topic guide, the setting, the length, and how they were recorded.
• For secondary data: the source, the time period, and any selection rules.

Include the timeframe, so the reader knows when data were collected.

Section 6: Data Analysis

Say exactly how you analyzed the data.

• Quantitative: the software, the tests, the significance level, and how you handled missing data.
• Qualitative: the method (for example, thematic analysis), the steps you followed, and how you checked that your coding was consistent.

Example wording (quantitative): Data were analyzed using SPSS. Descriptive statistics summarized the sample, and an independent-samples t-test compared mean scores between groups, with significance set at p < .05.

Example wording (qualitative): Interview transcripts were analyzed using thematic analysis following a six-phase approach. Codes were developed inductively, grouped into themes, and reviewed against the full data set.

Section 7: Validity, Reliability, or Trustworthiness

Show that your findings can be trusted.

• Quantitative studies discuss validity (does it measure what it claims?) and reliability (is it consistent?).
• Qualitative studies discuss trustworthiness: credibility, transferability, dependability, and confirmability.

Our article on validity and reliability explains the terms.

Section 8: Ethical Considerations

Cover:

• Ethics approval (who approved and when).
• Informed consent.
• Confidentiality and anonymity.
• Data storage and protection.
• The right to withdraw.
• Any risks to participants and how you reduced them.

Section 9: Limitations

Acknowledge weaknesses honestly. A short, clear limitations section strengthens your credibility. Explain what the limitations mean for the findings and how you tried to reduce them.

Section 10: Summary

End with a sentence or two that summarizes the approach and leads into the findings chapter.

Common Mistakes

• Describing methods without explaining why.
• Using terms such as "mixed methods" without showing how the parts connect.
• Leaving out sample details.
• Not mentioning ethics or approval.
• Writing in a different tense or voice from the rest of the dissertation.
• Hiding limitations.
• Copying wording from method textbooks without adapting it to the project.

A Final Checklist

1. Does each decision have a justification?
2. Does the method fit the research question?
3. Could another researcher repeat the study from my description?
4. Have I covered sampling, data collection, analysis, ethics, and limitations?
5. Is my wording clear and consistent?

Summary

A strong methodology chapter explains what you did, why it was the right choice, and what its limits are. Work through the sections in order, justify each decision, and keep the language specific enough that another researcher could follow it.

Where to Go Next

• Write up what the method produced: Dissertation Findings Chapter.
• Plan the whole project: How to Structure a Dissertation.
• Get your chapter reviewed by our dissertation editing service.
• Talk through design choices with academic coaching, or check the pricing.
• Keep reading: How to Write a Dissertation Title Page: What to Include

From choosing a topic to polishing a final draft, CampusScribe's subject-specialist editors and coaches help with dissertations, capstone projects, presentations, and more - whether you need topic guidance, structural feedback, or a final edit before your deadline.