phd paper

• What Is a PhD Thesis?
• Doing a PhD

This page will explain what a PhD thesis is and offer advice on how to write a good thesis, from outlining the typical structure to guiding you through the referencing. A summary of this page is as follows:

• A PhD thesis is a concentrated piece of original research which must be carried out by all PhD students in order to successfully earn their doctoral degree.
• The fundamental purpose of a thesis is to explain the conclusion that has been reached as a result of undertaking the research project.
• The typical PhD thesis structure will contain four chapters of original work sandwiched between a literature review chapter and a concluding chapter.
• There is no universal rule for the length of a thesis, but general guidelines set the word count between 70,000 to 100,000 words .

What Is a Thesis?

A thesis is the main output of a PhD as it explains your workflow in reaching the conclusions you have come to in undertaking the research project. As a result, much of the content of your thesis will be based around your chapters of original work.

For your thesis to be successful, it needs to adequately defend your argument and provide a unique or increased insight into your field that was not previously available. As such, you can’t rely on other ideas or results to produce your thesis; it needs to be an original piece of text that belongs to you and you alone.

What Should a Thesis Include?

Although each thesis will be unique, they will all follow the same general format. To demonstrate this, we’ve put together an example structure of a PhD thesis and explained what you should include in each section below.

Acknowledgements

This is a personal section which you may or may not choose to include. The vast majority of students include it, giving both gratitude and recognition to their supervisor, university, sponsor/funder and anyone else who has supported them along the way.

1. Introduction

Provide a brief overview of your reason for carrying out your research project and what you hope to achieve by undertaking it. Following this, explain the structure of your thesis to give the reader context for what he or she is about to read.

2. Literature Review

Set the context of your research by explaining the foundation of what is currently known within your field of research, what recent developments have occurred, and where the gaps in knowledge are. You should conclude the literature review by outlining the overarching aims and objectives of the research project.

3. Main Body

This section focuses on explaining all aspects of your original research and so will form the bulk of your thesis. Typically, this section will contain four chapters covering the below:

• your research/data collection methodologies,
• your results,
• a comprehensive analysis of your results,
• a detailed discussion of your findings.

Depending on your project, each of your chapters may independently contain the structure listed above or in some projects, each chapter could be focussed entirely on one aspect (e.g. a standalone results chapter). Ideally, each of these chapters should be formatted such that they could be translated into papers for submission to peer-reviewed journals. Therefore, following your PhD, you should be able to submit papers for peer-review by reusing content you have already produced.

4. Conclusion

The conclusion will be a summary of your key findings with emphasis placed on the new contributions you have made to your field.

When producing your conclusion, it’s imperative that you relate it back to your original research aims, objectives and hypotheses. Make sure you have answered your original question.

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How Many Words Is a PhD Thesis?

A common question we receive from students is – “how long should my thesis be?“.

Every university has different guidelines on this matter, therefore, consult with your university to get an understanding of their full requirements. Generally speaking, most supervisors will suggest somewhere between 70,000 and 100,000 words . This usually corresponds to somewhere between 250 – 350 pages .

We must stress that this is flexible, and it is important not to focus solely on the length of your thesis, but rather the quality.

How Do I Format My Thesis?

Although the exact formatting requirements will vary depending on the university, the typical formatting policies adopted by most universities are:

What Happens When I Finish My Thesis?

After you have submitted your thesis, you will attend a viva . A viva is an interview-style examination during which you are required to defend your thesis and answer questions on it. The aim of the viva is to convince your examiners that your work is of the level required for a doctoral degree. It is one of the last steps in the PhD process and arguably one of the most daunting!

For more information on the viva process and for tips on how to confidently pass it, please refer to our in-depth PhD Viva Guide .

How Do I Publish My Thesis?

Unfortunately, you can’t publish your thesis in its entirety in a journal. However, universities can make it available for others to read through their library system.

If you want to submit your work in a journal, you will need to develop it into one or more peer-reviewed papers. This will largely involve reformatting, condensing and tailoring it to meet the standards of the journal you are targeting.

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10 tips for writing a PhD thesis

Ingrid curl shares simple rules for keeping your work clear and jargon-free.

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Writing up a PhD can often take place in a frenzy of activity in the last few months of your degree study, after years of hard work. But there are some steps that you can take to increase your chances of success.

• Do not be daunted by the task of “writing up”. Work on the text as your PhD takes shape, remember that all writers need editing, and help yourself by using these basic tips to make life easier. Read what great writers say about how to write before you start, and take their advice to heart. There is no dark art to clear, concise work; it is mostly a result of editing, and editing again. Above all, keep Elmore Leonard’s advice in mind: “If it reads like writing…rewrite it.”
• Plan the structure of your thesis carefully with your supervisor. Create rough drafts as you go so that you can refine them as you become more focused on the write-up. Much of writing comprises rewriting so be prepared to rework each chapter many times. Even Ernest Hemingway said: “The first draft of everything is shit.”
• Academic writing does not have to be dry. Inject some flair into your work. Read advice on writing and remember George Orwell’s words in Why I Write : “Never use the passive where you can use the active”; and Mark Twain’s on adjectives: “When you catch an adjective, kill it.” If you prefer, Stephen King said: “The road to hell is paved with adverbs.”
• Do not write up in chronological order. Work on each chapter while it is fresh in your mind or pertinent to what you are doing at that moment, but come back to it all later and work it up into a consistent, coherent piece, restructuring sections where necessary.
• Think carefully about your writing. Write your first draft, leave it and then come back to it with a critical eye. Look objectively at the writing and read it closely for style and sense. Look out for common errors such as dangling modifiers, subject-verb disagreement and inconsistency. If you are too involved with the text to be able to take a step back and do this, then ask a friend or colleague to read it with a critical eye. Remember Hemingway’s advice: “Prose is architecture, not interior decoration.” Clarity is key.
• Most universities use a preferred style of references. Make sure you know what this is and stick to it. One of the most common errors in academic writing is to cite papers in the text that do not then appear in the bibliography. All references in your thesis need to be cross-checked with the bibliography before submission. Using a database during your research can save a great deal of time in the writing-up process. Helpful software includes EndNote or Paperpile. Managing your bibliography from day one may seem obsessive but it will save you a great deal of time and stress by the end of the PhD process.
• Use a house style. Professional publications such as Times Higher Education use a house style guide to ensure consistency in spelling. For example, do not use both -ise spellings and -ize spellings, stick to British spelling and be consistent when referring to organisations or bodies. Because dictionaries vary in their use of hyphenation, use one dictionary and stick to it throughout the writing process. If you consult the New Oxford Dictionary for Writers and Editors , you will note the extraordinary number of words with alternative spellings. It can also be a very useful guide to preferred spellings, use of italicisation and foreign phrases.
• Take care when quoting from other sources. Ensure you note whether the italic emphasis is in the original and take careful notes when you are collecting quotes for your thesis. Transcribe them accurately to save work later and keep original spellings (even if they differ from your chosen style) to ensure fidelity to your source.
• Think about plagiarism. If you are quoting from works, quote from them accurately and paraphrase where necessary for your argument. This is where careful note-taking and use of references is invaluable and will help you to avoid even inadvertently plagiarising another work.
• Remember that your thesis is your chance to present your work in the best possible light. Consider your opening paragraphs, entice your reader with your writing and above all be clear about your hypothesis and your conclusion. Append material where it adds value but not where it merely bulks out your work. Consider your reader at all times. This is your chance to showcase your work.

If you stick to these simple rules, your writing will be clear and jargon-free. Above all, take to heart Orwell’s advice: “Never use a foreign phrase, a scientific word, or a jargon word if you can think of an everyday English equivalent.”

Ingrid Curl is associate editor of  Times Higher Education , and a former PhD student.

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