Writing a Dissertation Introduction: Structure and Examples

The introduction is the first chapter your examiners read and the one that shapes how they read the rest. A strong one makes the project feel purposeful and well framed. A weak one leaves readers unsure what the dissertation is about, and that uncertainty colors everything after it.

This guide explains what to include, how to organize it and how to avoid common problems. It builds on earlier work in your proposal, so much of the material may already exist in draft.

What the introduction does

A dissertation introduction has to answer questions in the reader's mind.

1. What is this about? The topic and context.
2. What is the problem? What is missing or wrong.
3. Why does it matter? Significance.
4. What will you do? Aims and research questions.
5. How will you do it? A short preview of the approach.
6. How is the document organized? A chapter outline.

It should be clear enough that a smart reader outside your field could follow the project.

A typical structure

Departments vary, so follow your own template.

Opening and background

Start with the context. Give the reader enough background to understand the area, without trying to cover the whole field. A good opening is specific and connects to the problem. Avoid sweeping statements such as "Since the dawn of time". Move from the general area to the specific issue within a few paragraphs. Support claims with evidence and citations.

The problem

State the problem or gap clearly, using evidence. Our guide to writing a problem statement explains how to build it in four parts: the context, the evidence, the gap and the purpose. In the introduction, you can keep this tighter than in the proposal, since the literature review covers the detail.

Aims, objectives and research questions

State your overall aim in one sentence, followed by your objectives and research questions, in the form your program expects. Make sure they match what the dissertation actually answers. If your questions changed during the project, revise this section so it describes the final project. Our guide to research questions and objectives explains how to write them.

Significance and rationale

Explain why your study matters, to whom and in what way. Possible contributions include:

• Filling a gap in the literature.
• Informing practice or policy.
• Testing a theory in a new context.
• Providing evidence for a particular group.
• Developing a method or a tool.

Be honest and proportionate. A master's dissertation does not usually transform a field, and claiming too much weakens credibility.

Scope and definitions

Say what the study covers and what it does not. Name the population, setting and time frame, and note any deliberate exclusions. Define key terms that you use in a particular way, especially when different authors use them differently. Clear boundaries show that you have thought carefully, and they pre-empt questions about what you left out.

Overview of the approach

Give a short preview of your design: for example, a mixed methods study using a survey and interviews with first-year students at one university. Save the detail for the methodology chapter. The point is to let the reader know what kind of study to expect.

The structure of the dissertation

End with a paragraph that outlines the chapters, one sentence each:

Chapter 2 reviews the literature on peer mentoring and nurse retention. Chapter 3 describes the methodology. Chapter 4 presents the findings. Chapter 5 discusses them in light of the literature, and Chapter 6 concludes with implications and recommendations.

Our guide to dissertation structure explained shows what each chapter contains.

Length and proportion

The introduction is usually short compared with other chapters, often 5 to 10 percent of the whole. If it runs much longer, you may be including literature review material or too much background. If it is very short, you may be skipping the justification. Check your program's guidelines.

Writing tips

• Write it last, or rewrite it last. The introduction should describe the dissertation you finished, not the one you planned.
• Use the future or present tense consistently, as your program prefers, to describe what the dissertation does.
• Be specific. Replace general claims with evidence.
• Keep a clear thread from problem to questions to approach.
• Avoid reporting results in the introduction.
• Use signposting so readers know where they are.
• Cite your sources.

A short sample outline

Here is an outline for an introduction to a study on peer mentoring.

1. Opening: new graduate nurse turnover as a workforce challenge, with data.
2. Background: the role of mentoring programs, and what is known in large hospitals.
3. Problem and gap: little evidence from small community hospitals.
4. Aim and questions: to examine how a unit-based mentoring program relates to first-year retention and how nurses experience it.
5. Significance: informs onboarding decisions in similar hospitals.
6. Scope: two community hospitals, one year, new graduate nurses.
7. Approach: mixed methods, with retention data and interviews.
8. Structure: chapter outline.

(The study is illustrative.)

Introductions in different kinds of dissertation

The same elements appear in most projects, but the emphasis shifts. An empirical dissertation spends more space on the gap and the research questions, since the study is built to answer them. A theoretical or humanities dissertation often states a central argument or thesis early, and previews how each chapter develops it. A practice-based project describes the practical setting and the problem in the field, with a short statement of how the project will improve it. A systematic review introduction frames the review question and why the existing evidence needs synthesizing.

Whichever type you are writing, keep the same promise: tell the reader what the problem is, what you will do about it and how the document is organized.

Revising the introduction after you finish

When the dissertation is complete, reread the introduction against the finished work and check four things. Do the aims and questions describe what you really did? Does the problem statement match the gap your literature review built? Does the preview of methods match what the methodology chapter reports? Does the chapter outline match the final chapter titles? Small mismatches are common, because projects change as they go, and they are easy to fix at this stage.

Writing a clear opening paragraph

The first paragraph does more work than any other. It should orient readers to the topic and signal the problem within a few sentences. A reliable approach is to begin with a specific fact, trend or situation that shows why the topic matters, move to the issue in your field and end the paragraph with the question or tension that your dissertation will resolve. Avoid starting with a definition from a dictionary or a statement that has been true for centuries. Readers should feel that the project has a reason to exist by the end of the first page.

Common mistakes

• Too much background, drifting into a literature review.
• A weak or missing problem and gap.
• Aims and questions that do not match the final study.
• Overclaiming significance.
• No scope or definitions.
• Reporting findings in the introduction.
• A generic opening with no link to the project.
• Writing it only at the start and never revising.

A quick checklist

• Does it set context and show a clear problem or gap?
• Are the aims and questions clear and consistent with the study?
• Is the significance stated honestly?
• Are the scope and key terms defined?
• Does it preview the approach and the structure?
• Is it the right length and updated to match the final dissertation?

Final thoughts

A dissertation introduction is a guide for the reader. Show where you are, what is missing, what you will do about it and how the document unfolds. Write a draft early to focus your thinking, and rewrite it once the project is done, so that it honestly describes what you achieved. A clear introduction makes every chapter after it easier to read.