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Definition of 'dissertation'

• dissertation

Video: pronunciation of dissertation

dissertation in British English

Dissertation in american english, examples of 'dissertation' in a sentence dissertation, cobuild collocations dissertation, trends of dissertation.

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In other languages dissertation

• American English : dissertation / dɪsərˈteɪʃən /
• Brazilian Portuguese : dissertação
• Chinese : 论文 学位
• European Spanish : tesina
• French : mémoire
• German : Dissertation
• Italian : tesi
• Japanese : 学位論文
• Korean : 논문 학위
• European Portuguese : dissertação
• Latin American Spanish : tesina

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• dissepiment
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• Knowledge Base
• Dissertation

What Is a Dissertation? | Guide, Examples, & Template

A dissertation is a long-form piece of academic writing based on original research conducted by you. It is usually submitted as the final step in order to finish a PhD program.

Your dissertation is probably the longest piece of writing you’ve ever completed. It requires solid research, writing, and analysis skills, and it can be intimidating to know where to begin.

Your department likely has guidelines related to how your dissertation should be structured. When in doubt, consult with your supervisor.

You can also download our full dissertation template in the format of your choice below. The template includes a ready-made table of contents with notes on what to include in each chapter, easily adaptable to your department’s requirements.

Download Word template Download Google Docs template

• In the US, a dissertation generally refers to the collection of research you conducted to obtain a PhD.
• In other countries (such as the UK), a dissertation often refers to the research you conduct to obtain your bachelor’s or master’s degree.

Table of contents

Dissertation committee and prospectus process, how to write and structure a dissertation, acknowledgements or preface, list of figures and tables, list of abbreviations, introduction, literature review, methodology, reference list, proofreading and editing, defending your dissertation, free checklist and lecture slides.

When you’ve finished your coursework, as well as any comprehensive exams or other requirements, you advance to “ABD” (All But Dissertation) status. This means you’ve completed everything except your dissertation.

Prior to starting to write, you must form your committee and write your prospectus or proposal . Your committee comprises your adviser and a few other faculty members. They can be from your own department, or, if your work is more interdisciplinary, from other departments. Your committee will guide you through the dissertation process, and ultimately decide whether you pass your dissertation defense and receive your PhD.

Your prospectus is a formal document presented to your committee, usually orally in a defense, outlining your research aims and objectives and showing why your topic is relevant . After passing your prospectus defense, you’re ready to start your research and writing.

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The structure of your dissertation depends on a variety of factors, such as your discipline, topic, and approach. Dissertations in the humanities are often structured more like a long essay , building an overall argument to support a central thesis , with chapters organized around different themes or case studies.

However, hard science and social science dissertations typically include a review of existing works, a methodology section, an analysis of your original research, and a presentation of your results , presented in different chapters.

Dissertation examples

We’ve compiled a list of dissertation examples to help you get started.

• Example dissertation #1: Heat, Wildfire and Energy Demand: An Examination of Residential Buildings and Community Equity (a dissertation by C. A. Antonopoulos about the impact of extreme heat and wildfire on residential buildings and occupant exposure risks).
• Example dissertation #2: Exploring Income Volatility and Financial Health Among Middle-Income Households (a dissertation by M. Addo about income volatility and declining economic security among middle-income households).
• Example dissertation #3: The Use of Mindfulness Meditation to Increase the Efficacy of Mirror Visual Feedback for Reducing Phantom Limb Pain in Amputees (a dissertation by N. S. Mills about the effect of mindfulness-based interventions on the relationship between mirror visual feedback and the pain level in amputees with phantom limb pain).

The very first page of your document contains your dissertation title, your name, department, institution, degree program, and submission date. Sometimes it also includes your student number, your supervisor’s name, and the university’s logo.

Read more about title pages

The acknowledgements section is usually optional and gives space for you to thank everyone who helped you in writing your dissertation. This might include your supervisors, participants in your research, and friends or family who supported you. In some cases, your acknowledgements are part of a preface.

Read more about acknowledgements Read more about prefaces

Prevent plagiarism. Run a free check.

The abstract is a short summary of your dissertation, usually about 150 to 300 words long. Though this may seem very short, it’s one of the most important parts of your dissertation, because it introduces your work to your audience.

Your abstract should:

• State your main topic and the aims of your research
• Describe your methods
• Summarize your main results
• State your conclusions

Read more about abstracts

The table of contents lists all of your chapters, along with corresponding subheadings and page numbers. This gives your reader an overview of your structure and helps them easily navigate your document.

Remember to include all main parts of your dissertation in your table of contents, even the appendices. It’s easy to generate a table automatically in Word if you used heading styles. Generally speaking, you only include level 2 and level 3 headings, not every subheading you included in your finished work.

Read more about tables of contents

While not usually mandatory, it’s nice to include a list of figures and tables to help guide your reader if you have used a lot of these in your dissertation. It’s easy to generate one of these in Word using the Insert Caption feature.

Read more about lists of figures and tables

Similarly, if you have used a lot of abbreviations (especially industry-specific ones) in your dissertation, you can include them in an alphabetized list of abbreviations so that the reader can easily look up their meanings.

Read more about lists of abbreviations

In addition to the list of abbreviations, if you find yourself using a lot of highly specialized terms that you worry will not be familiar to your reader, consider including a glossary. Here, alphabetize the terms and include a brief description or definition.

Read more about glossaries

The introduction serves to set up your dissertation’s topic, purpose, and relevance. It tells the reader what to expect in the rest of your dissertation. The introduction should:

• Establish your research topic , giving the background information needed to contextualize your work
• Narrow down the focus and define the scope of your research
• Discuss the state of existing research on the topic, showing your work’s relevance to a broader problem or debate
• Clearly state your research questions and objectives
• Outline the flow of the rest of your work

Everything in the introduction should be clear, engaging, and relevant. By the end, the reader should understand the what, why, and how of your research.

Read more about introductions

A formative part of your research is your literature review . This helps you gain a thorough understanding of the academic work that already exists on your topic.

Literature reviews encompass:

• Finding relevant sources (e.g., books and journal articles)
• Assessing the credibility of your sources
• Critically analyzing and evaluating each source
• Drawing connections between them (e.g., themes, patterns, conflicts, or gaps) to strengthen your overall point

A literature review is not merely a summary of existing sources. Your literature review should have a coherent structure and argument that leads to a clear justification for your own research. It may aim to:

• Address a gap in the literature or build on existing knowledge
• Take a new theoretical or methodological approach to your topic
• Propose a solution to an unresolved problem or advance one side of a theoretical debate

Read more about literature reviews

Theoretical framework

Your literature review can often form the basis for your theoretical framework. Here, you define and analyze the key theories, concepts, and models that frame your research.

Read more about theoretical frameworks

Your methodology chapter describes how you conducted your research, allowing your reader to critically assess its credibility. Your methodology section should accurately report what you did, as well as convince your reader that this was the best way to answer your research question.

A methodology section should generally include:

• The overall research approach ( quantitative vs. qualitative ) and research methods (e.g., a longitudinal study )
• Your data collection methods (e.g., interviews or a controlled experiment )
• Details of where, when, and with whom the research took place
• Any tools and materials you used (e.g., computer programs, lab equipment)
• Your data analysis methods (e.g., statistical analysis , discourse analysis )
• An evaluation or justification of your methods

Read more about methodology sections

Your results section should highlight what your methodology discovered. You can structure this section around sub-questions, hypotheses , or themes, but avoid including any subjective or speculative interpretation here.

Your results section should:

• Concisely state each relevant result together with relevant descriptive statistics (e.g., mean , standard deviation ) and inferential statistics (e.g., test statistics , p values )
• Briefly state how the result relates to the question or whether the hypothesis was supported
• Report all results that are relevant to your research questions , including any that did not meet your expectations.

Additional data (including raw numbers, full questionnaires, or interview transcripts) can be included as an appendix. You can include tables and figures, but only if they help the reader better understand your results. Read more about results sections

Your discussion section is your opportunity to explore the meaning and implications of your results in relation to your research question. Here, interpret your results in detail, discussing whether they met your expectations and how well they fit with the framework that you built in earlier chapters. Refer back to relevant source material to show how your results fit within existing research in your field.

Some guiding questions include:

• What do your results mean?
• Why do your results matter?
• What limitations do the results have?

If any of the results were unexpected, offer explanations for why this might be. It’s a good idea to consider alternative interpretations of your data.

Read more about discussion sections

Your dissertation’s conclusion should concisely answer your main research question, leaving your reader with a clear understanding of your central argument and emphasizing what your research has contributed to the field.

In some disciplines, the conclusion is just a short section preceding the discussion section, but in other contexts, it is the final chapter of your work. Here, you wrap up your dissertation with a final reflection on what you found, with recommendations for future research and concluding remarks.

It’s important to leave the reader with a clear impression of why your research matters. What have you added to what was already known? Why is your research necessary for the future of your field?

Read more about conclusions

It is crucial to include a reference list or list of works cited with the full details of all the sources that you used, in order to avoid plagiarism. Be sure to choose one citation style and follow it consistently throughout your dissertation. Each style has strict and specific formatting requirements.

Common styles include MLA , Chicago , and APA , but which style you use is often set by your department or your field.

Create APA citations Create MLA citations

Your dissertation should contain only essential information that directly contributes to answering your research question. Documents such as interview transcripts or survey questions can be added as appendices, rather than adding them to the main body.

Read more about appendices

Making sure that all of your sections are in the right place is only the first step to a well-written dissertation. Don’t forget to leave plenty of time for editing and proofreading, as grammar mistakes and sloppy spelling errors can really negatively impact your work.

Dissertations can take up to five years to write, so you will definitely want to make sure that everything is perfect before submitting. You may want to consider using a professional dissertation editing service or grammar checker to make sure your final project is perfect prior to submitting.

After your written dissertation is approved, your committee will schedule a defense. Similarly to defending your prospectus, dissertation defenses are oral presentations of your work. You’ll present your dissertation, and your committee will ask you questions. Many departments allow family members, friends, and other people who are interested to join as well.

After your defense, your committee will meet, and then inform you whether you have passed. Keep in mind that defenses are usually just a formality; most committees will have resolved any serious issues with your work with you far prior to your defense, giving you ample time to fix any problems.

As you write your dissertation, you can use this simple checklist to make sure you’ve included all the essentials.

Checklist: Dissertation

My title page includes all information required by my university.

I have included acknowledgements thanking those who helped me.

My abstract provides a concise summary of the dissertation, giving the reader a clear idea of my key results or arguments.

I have created a table of contents to help the reader navigate my dissertation. It includes all chapter titles, but excludes the title page, acknowledgements, and abstract.

My introduction leads into my topic in an engaging way and shows the relevance of my research.

My introduction clearly defines the focus of my research, stating my research questions and research objectives .

My introduction includes an overview of the dissertation’s structure (reading guide).

I have conducted a literature review in which I (1) critically engage with sources, evaluating the strengths and weaknesses of existing research, (2) discuss patterns, themes, and debates in the literature, and (3) address a gap or show how my research contributes to existing research.

I have clearly outlined the theoretical framework of my research, explaining the theories and models that support my approach.

I have thoroughly described my methodology , explaining how I collected data and analyzed data.

I have concisely and objectively reported all relevant results .

I have (1) evaluated and interpreted the meaning of the results and (2) acknowledged any important limitations of the results in my discussion .

I have clearly stated the answer to my main research question in the conclusion .

I have clearly explained the implications of my conclusion, emphasizing what new insight my research has contributed.

I have provided relevant recommendations for further research or practice.

If relevant, I have included appendices with supplemental information.

I have included an in-text citation every time I use words, ideas, or information from a source.

I have listed every source in a reference list at the end of my dissertation.

I have consistently followed the rules of my chosen citation style .

I have followed all formatting guidelines provided by my university.

Congratulations!

The end is in sight—your dissertation is nearly ready to submit! Make sure it's perfectly polished with the help of a Scribbr editor.

If you’re an educator, feel free to download and adapt these slides to teach your students about structuring a dissertation.

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• Education /

What is a Dissertation? Meaning, Projects, Report Work

• Updated on  
• Feb 26, 2022

A dissertation is a long academic piece of writing based on a student’s independent research . It is usually submitted in the final semester of UG, PG and PhD courses . It takes about 1-2 years to complete the dissertation as it requires a lot of research and written documentation . The aim of writing a dissertation is to test a student’s research skills. It allows students to develop their research, problem-solving, project management and numerical skills . During the course of writing a dissertation, students become able to present their research-based findings to the proposition they chose for themselves.

This Blog Includes:

Empirical dissertation, non-empirical dissertation, skills you need to show, how long is a dissertation, empirical dissertation structure, non-empirical structure, dissertation project example, checklist for dissertation, helpful tips for writing a dissertation, difference between a dissertation and essay, dissertation vs thesis, types of dissertation.

The type of dissertation you may be doing completely depends upon the field of your study. However, there are 2 types of dissertation mentioned below in the table:

If you are a student of sciences or social sciences, you’ll be required to write an empirical dissertation . Its focus is mainly on collecting original data and analysing every aspect of the data. Students can choose different research methods such as surveys, observation, laboratory experiments and interviews . Keeping in mind that the aim of an Empirical dissertation is to produce standardized scientific knowledge, students must consider the variables they will investigate, the reliability of their measurements, and choose the correct sampling method.

Non-empirical research is generally done for subjects such as arts and humanities . Choosing a particular topic and collecting the data from primary and secondary sources is the first step of starting with this type of dissertation. While working on non-empirical research, a student does the work with existing research or other texts, presents original analysis, argumentation, but there is no original data . The aim is to analyse theoretical texts and interpret the sources with your own understanding.

Regardless of the type of dissertation you write or the topic you pick, you’ll need to demonstrate the following abilities:

A dissertation’s length varies by study level and location, although it normally ranges from 10,000 to 12,000 words for undergraduates, 15,000 to 25,000 words for master’s students, and up to 50,000 words or more for PhD students.

Structure of a Dissertation

A dissertation is basically divided into chapters and sections . Both empirical and non-empirical dissertations have different kinds of structures that are supposed to be followed while writing a dissertation. Empirical dissertations usually have a more standardized structure than that of a non-empirical dissertation which is more flexible.

The structure may be slightly different but an empirical dissertation must include the following chapters:

•   Introduction: Explanation of your topic and research questions
•  Literature Review : Evaluation of your research topic
•  Methodology: Description of the research method 
• Results: Explanation of the found research
•  Discussions: Interpret what your results have revealed
• Conclusion: Final reflection of what you’ve found through the thesis

The structure or outline of a non-empirical dissertation is quite flexible as it involves existing research and texts . The aim of non-empirical research is to present original and independent analysis based on theoretical research . It is basically an extended essay but while writing a non-empirical thesis, the text must be presented precisely to serve your arguments in a logical manner. However, mentioned below is a general outline that must be followed while writing a non-empirical dissertation:

•  Introduction: Explanation of your topic and Research Questions
•  Main Body: Development of your analysis of the text or source
•  Conclusion: Summarisation of what the analysis has contributed so far

*The main body is divided into 2-4 chapters.

Non-Empirical Dissertation Structure Example

Depending on the topic you’ve chosen, the main body can be divided into different types.  One of the most common topics of non-empirical research is history-based . The following mentioned is an example of a renaissance based topic:

TABLE OF CONTENTS

• Introduction
• Chapter 1: Origins of the Renaissance in the Classical World
• Chapter 2: Artists of the Renaissance
• Chapter 3: The Spread of the Renaissance
• Chapter 4: The Renaissance and the Reformation

Mentioned below is a checklist to make sure you’ve included all the required information:

• Title page includes all the information
• Acknowledgements
• Concise summary of the dissertation 
• Table of contents
• Clear and precise introduction
• Literature review that includes patterns, themes, and debates
• Theoretical framework of the research
• Description of the used methodology
• Clear mention of the questions answered
• Relevant recommendations for further research
• Citations and bibliography
• Reference list at the end of the thesis
• Format provided by the university is followed
• Start with time management . Make a proper daily schedule and set your deadlines Decide how much time you need to write a section or chapter . Choose the hours and start working on the it. In this way, you’ll be able to complete the this in the given time.
• Remember that the first writing draft is not the final dissertation . Make sure to proofread your writing several times. This will make you present your augmentations in a more precise way,
• Skip the introduction part and leave it for the end. Try to write the main body first, so that you get time to gather your thoughts. This way you will be able to present the introduction in a clear manner as you’ve been working on the this for a long period of time.
• Don’t wait for the end time to get feedback from your supervisor . Try to share the research work more often and a lot earlier than the submission time, so that you get time to improve your mistakes. It may save you from rewriting several chapters and sections.
• Use a reference manager to make it easier for you to mention the citations without taking much time.

PhD must include over  60,000 words and should not exceed the limit of 80,000 words.

It takes around a year or two to complete a dissertation but if you manage time properly and catch up the speed you may be able to complete it in less than 8 months.

Hopefully, this blog assisted you in finding out what is Dissertation, its structure and more. If you require any assistance regarding your application process while enrolling for your further studies, our experts at Leverage Edu are just one click away. Call us anytime at 1800 572 000 for a free counselling session!

Damanpreet Kaur Vohra

Daman is an author with profound expertise in writing engaging and informative content focused on EdTech and Study Abroad. With a keen understanding of these domains, Daman excels at creating complex concepts into accessible, reader-friendly material. With a proven track record of insightful articles, Daman stands as a reliable source for providing content for EdTech and Study Abroad.

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• dissertation

a written essay, treatise, or thesis, especially one written by a candidate for the degree of Doctor of Philosophy.

any formal discourse in speech or writing.

Origin of dissertation

Other words from dissertation.

• dis·ser·ta·tion·al, adjective
• dis·ser·ta·tion·ist, noun

Words that may be confused with dissertation

• dissertation , thesis

Words Nearby dissertation

• dissenting opinion
• dissentious
• dissepiment

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use dissertation in a sentence

Thirteen years ago, while working on her PHD dissertation in Madagascar’s Masoala Peninsula, Borgerson encountered a problem.

At Harvard, he received a PhD in government and wrote his dissertation under Henry Kissinger, who became a lifelong friend.

I planned to go back to physics after a couple of years and then return to wrap up my dissertation .

My buba’s lived experience helped shape me into the girl who wrote her college dissertation on the gender pay gap, arguing for equal parental leave for dads and moms, almost 20 years before any major employer implemented any such thing.

My PhD dissertation was a highly theoretical model representing computer systems that were framed as a mathematical model, and if they were interconnected in such a way that these interconnected computers would communicate like cells in the body.

A terrific cultural studies dissertation awaits on how the fortunes of the Cheneys provide a mirror on a changing America.

Today, he visits online forums and bombards them with dissertation -length comments.

In her dissertation , McFate had asked whether ‘good anthropology’ might lead to ‘better killing.’

Heritage has distanced itself from Richwine and his dissertation .

No single dissertation will alter the status quo on its own.

I've never had time to write home about it, for I felt that it required a dissertation in itself to do it justice.

Dr. Pitcairn, published at Leyden his dissertation on the circulation of the blood through the veins.

Start not, reader, I am not going to trouble you with a poetical dissertation ; no, no!

dissertation sur les Assassins, Académie des Inscriptions, tom.

This dissertation , which is illustrated by several plates, will repay for the time spent in reading it.

British Dictionary definitions for dissertation

/ ( ˌdɪsəˈteɪʃən ) /

a written thesis, often based on original research, usually required for a higher degree

a formal discourse

Derived forms of dissertation

• dissertational , adjective
• dissertationist , noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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dissertation

Definition of dissertation

Examples of dissertation in a sentence.

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'dissertation.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

1651, in the meaning defined above

Dictionary Entries Near dissertation

dissertative

Cite this Entry

“Dissertation.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/dissertation. Accessed 13 Nov. 2023.

Kids Definition

Kids definition of dissertation, more from merriam-webster on dissertation.

Thesaurus: All synonyms and antonyms for dissertation

Nglish: Translation of dissertation for Spanish Speakers

Britannica English: Translation of dissertation for Arabic Speakers

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What is a dissertation? How is it different from an essay?

There are some obvious differences: an essay is relatively short – usually 1500 to 2500 words – and you are told clearly what to do by someone else. For example: Describe and evaluate major theories of globalisation.

A dissertation is a subject you chose for yourself. The first usage of the word in the English language in 1651 also gives a useful starting definition: “an extended written treatment of a subject”.

Another useful clue is found in the Latin origin of the word – dissertation comes from a Latin word ‘dissertare’ = ‘to debate’.

What does the word ‘debate’ imply? A discussion involving different points of view or sets of ideas. A dissertation will therefore not only examine a subject but will review different points of view about that subject.

Here’s another definition that underlines some more important characteristics of a dissertation: “a substantial paper that is typically based on original research and that gives evidence of the candidate’s mastery both of her own subject and of scholarly method.”

A dissertation will show that the writer knows her subject, the key facts and different points of view in it – but it also advances a point of view resulting from original research. Remember that ‘original’ does not mean ‘something that’s never been done before’ but rather ‘something that you do for yourself’.

A dissertation also “gives evidence of the candidate’s mastery […] of scholarly method”. This sounds terribly daunting but don’t be put off. The phrase is telling you that you will have to lift your game to write a successful dissertation. ‘Scholarly method’ means that you will be expected to do more and better reading and research than for a standard undergraduate essay. It means that your work will display accuracy and skill in its investigation and discussion of a subject. It means that your discussion will give evidence of critical analysis i.e. standing back from your subject and weighing up pros and cons. It means you will show that you understand that, for example, aspects of particular theories or viewpoints are open to question.

Privacy Overview

Thesis vs. Dissertation: What’s the difference?

Thesis and dissertation are extensive research papers that differ in terms of their requirements, length, and purpose, with the former being associated with a master's degree and the latter with a doctoral degree, but are often used interchangeably.

Updated on September 15, 2023

A thesis and a dissertation are both extensive research papers, and both require literature searches and novel findings, but the two differ in various ways. Their definitions also differ across regions. Typically, in North America, a thesis is required for the completion of a master’s degree, while a dissertation is required for the completion of a doctoral degree. The former is long, while the latter is longer and more intensive.

Despite these differences, the two terms are often used interchangeably, especially among those who haven’t completed one or the other. Here, we’ll compare the components, length, and purpose of these two academic documents to clearly understand the differences between these important papers in the life of a graduate student.

What’s a thesis?

The term “thesis” explained here is generally consistent with how the word is used in North America to describe this substantive research paper.

A thesis is an extended argument (PDF). It is a research-based document that displays the student’s/author’s knowledge and understanding of a specific subject within their field of study. It generally presents findings on a particular topic. 

See this and this (PDFs) for examples. These superb master’s theses from Canada will give you an idea of the size and format of these papers.

Who would write a thesis?

You generally write a thesis if you’re undertaking a research-oriented master's degree program (as opposed to a practical program, which may require a capstone, internship, exam, etc.). 

The thesis is the essential part of a program’s research component, demonstrating the student's ability to critically analyze the literature and complete independent research. The process of writing a thesis involves exploring a specific research question, conducting a comprehensive literature review, collecting and analyzing data, and presenting findings in a structured and cohesive way.

A thesis' specific requirements and expectations differ depending on the academic institution, department, and program.

Components of a thesis

A thesis is typically presented in chapters. How many chapters will vary, but a common structure is:

• Introduction: Presents the research topic, purpose, and objectives, setting the context for the work.
• Literature review: Comprehensive survey of existing scholarly material related to the research topic, highlighting key theories and findings.
• Methodology: Describes the methods, procedures, and tools used in doing the research.
• Research: The actual performing of the study, collecting, and analyzing data relevant to the research question.
• Findings and conclusions: Gives the results obtained and explains their significance in relation to the research question.
• Limitations and future research: Outlines the study’s shortcomings and suggests potential areas for future investigation.

Within that structure, and in addition to those parts, a thesis may also include: 

• Cover page: Contains the thesis title, author's name, institution, department, date, and other relevant information
• Abstract : A brief summary of the thesis, highlighting the research objectives, methods, key findings, and conclusions.
• Certificates of own work
• Certificate of readiness to be included in the library
• Certificate that the research has not been presented to another university
• Acknowledgments
• Table of contents: List of the main sections, subsections, and corresponding page numbers.
• Index of figures and tables
• References: A comprehensive list of all the sources cited in the thesis, following a specific citation style (e.g., APA, MLA).
• Appendices (optional): Additional materials include:
• Abbreviations and/or acronyms used
• Questionnaire or interview schedule/s (if used)
• Data acquired in the form of transcripts or numeric tables
• Research protocol
• Ethics protocol

What’s a dissertation?

This is also viewed from a North American perspective, where a dissertation is usually the main research work toward completing a research-based doctoral program.

A dissertation is a comprehensive and in-depth research project completed as part of the requirements for a doctoral degree. It’s a substantial piece of original work that contributes new knowledge to a specific field of study.  Naturally, when it’s completed as the major requirement for earning a PhD, it’s longer, more detailed, and the expectations are higher.

Dissertations themselves can add to the literature in the field. For this reason, some students choose to publish them and have them indexed. The research and the data acquired while working on a dissertation can potentially lead to more publications and help define the researcher’s growing area of expertise.

See this and this (PDFs)  top-ranking dissertation on ProQuest for good examples.

Who would write a dissertation?

Completion and defense of a dissertation is a standard requirement for doctoral students to earn a PhD or another doctorate such as an EdD or DM. But some specialized degrees, such as a PsyD (Doctor of Psychology), JD (Juris Doctor) or DPT (Doctor of Physical Therapy) may have practice-based requirements in place of a research project, as these courses of study are geared more toward practical application.

Components of a dissertation

A dissertation’s components are generally the same as those of a thesis. You can look at the list above for a thesis to see what typically goes into a dissertation. But, if compared with a master’s thesis, most aspects are longer and more rigorous.

The word count requirements for theses can vary significantly, but doctoral dissertations often range 40,000–80,000 words or, per Harvard , 100–300 pages.

Differences between a thesis and a dissertation

As already touched on, the key differences are in where the two documents are used, length, and rigor. There are also regional differences.

A thesis typically demonstrates a master’s degree program student's grasp and presentation of a specific subject in their field of study. It normally involves a literature review, data analysis, and original research, but it is usually shorter and less comprehensive than a dissertation. The standards for rigor and novelty may also be lower.

A dissertation requires more extensive research, original contributions to the field, and a deeper exploration of the research topic. A dissertation is typically the output associated with a doctoral degree program.

The main differences in structure between a thesis and a dissertation are in the scope and complexity.

The word count requirement for theses and dissertations can vary depending on the institution and program.

A thesis is usually 20,000–40,000 words. However, there have been cases of mathematics dissertations that were only a few pages long!

Doctoral dissertations may range 60,000 to upward of 100,000 words, and exceed 100 pages. Many universities, however, seek around 80,000 words.

Oversight and process

A thesis may simply be submitted to the student's instructor, though rigorous thesis programs require a committee and defense. A dissertation will nearly always require the student to choose a chair, a committee, and then go through a more rigorous defense and revision (if necessary).

• Committee: Master's thesis committees usually have fewer members (typically 2–3) than doctoral dissertation committees (often 4–5, or even more).
• Guidance: Master's students often receive more detailed direction from advisers than doctoral students, who are expected to work more independently.
• Review: Dissertation reviews are typically more rigorous, often involving external reviewers, while thesis reviews are usually internal.
• Defense: A dissertation defense is generally more intense and formal, as it often involves a presentation to the wider academic community, while a thesis defense might be more confined and informal.
• Revision: The revision process for a doctoral dissertation is typically more extensive, given the larger scope of the project and higher stakes involved, compared with those for a master's thesis.

Regional differences

The terms' use varies among (and even within) countries. Here are some general regional differences:

In the United Kingdom, a thesis is commonly associated with both master's and doctoral degree programs. For example, the University College London  refers to a thesis for EngD, MPhil, MD(Res), and PhD degrees. At the University of Nottingham , a dissertation is written for a research master’s degree.

In Australia and New Zealand , “thesis” is generally used to refer to a substantial research project completed for a higher degree, though not limited to a master’s (you’ll find ample references to a “PhD thesis”).

In Latin American countries,  the thesis is commonly used to refer to both master's and doctoral research projects.

Closing thoughts

Both theses and dissertations are necessary documents for students in graduate programs. Despite the differences in expectations, and even in definitions of these papers, the student-author must do a diligent and rigorous job to earn their degree.

Here are a few helpful resources if you want to get into greater detail:

• Writing the Winning Thesis or Dissertation: A Step-By-Step Guide
• 100 PhD rules of the game to successfully complete a doctoral dissertation (PDF)
• Theses and Dissertations: A Guide to Writing in Social and Physical Sciences

Perfect the English on your thesis or dissertation

Whether you’re submitting a thesis or a dissertation, if it’s in English, it should:

• Have no grammatical or spelling mistakes
• Use field-appropriate language
• Concisely and clearly communicate your research.

That’s what AJE expert editors will do for you. Within days, you can receive an expert English edit of your work. The editor will be familiar with your field of study and will comprehensively improve both the language quality and the delivery of your message. Look into AJE English Editing .

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Definition of dissertation noun from the Oxford Advanced Learner's Dictionary

• dissertation
• He wrote his Master's dissertation on rats.
• Students can either do a dissertation or take part in a practical project.
• hall of residence
• Candidates are required to present a dissertation of between 8 000 and 12 000 words.
• She is writing her dissertation on the history of the Knights Templar.
• dissertation on

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