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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.
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.
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.
A thesis is typically presented in chapters. How many chapters will vary, but a common structure is:
Within that structure, and in addition to those parts, a thesis may also include:
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.
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.
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.
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.
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).
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.
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:
Whether you’re submitting a thesis or a dissertation, if it’s in English, it should:
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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By: Derek Jansen (MBA) | Expert Reviewed By: Dr. Eunice Rautenbach | October 2020
At Grad Coach, we receive questions about dissertation and thesis writing on a daily basis – everything from how to find a good research topic to which research methods to use and how to analyse the data.
One of the most common questions we receive is “what’s the difference between a dissertation and thesis?” . If you look around online, you’ll find a lot of confusing and often contrasting answers. In this post we’ll clear it up, once and for all…
Before comparing dissertations to theses, it’s useful to first understand what both of these are and what they have in common .
Dissertations and theses are both formal academic research projects . In other words, they’re academic projects that involve you undertaking research in a structured, systematic way. The research process typically involves the following steps :
In other words, theses and dissertations are both formal, structured research projects that involve using a clearly articulated methodology to draw out insights and answers to your research questions . So, in this respect, they are, for the most part, the same thing.
But, how are they different then?
Well, the key difference between a dissertation and a thesis is, for the most part, the level of study – in other words, undergrad, master or PhD. By extension, this also means that the complexity and rigorousness of the research differs between dissertations and theses.
This is where it gets a bit confusing. The meaning of dissertation or thesis varies depending on the country or region of study. For example, in the UK, a dissertation is generally a research project that’s completed at the end of a Masters-level degree, whereas a thesis is completed for a Doctoral-level degree.
Conversely, the terminology is flipped around in the US (and some other countries). In other words, a thesis is completed for a Masters-level degree, while a dissertation is completed for PhD (or any other doctoral-level degree).
Simply put, a dissertation and a thesis are essentially the same thing, but at different levels of study . The exact terminology varies from country to country, and sometimes it even varies between universities in the same country. Some universities will also refer to this type of project as a capstone project . In addition, some universities will also require an oral exam or viva voce , especially for doctoral-level projects.
Given that there are more than 25,000 universities scattered across the globe, all of this terminological complexity can cause some confusion. To be safe, make sure that you thoroughly read the brief provided by your university for your dissertation or thesis, and if possible, visit the university library to have a look at past students’ projects . This will help you get a feel for your institution’s norms and spot any nuances in terms of their specific requirements so that you can give them exactly what they want.
Dissertations and theses are both formal academic research projects . The main difference is the level of study – undergrad, Masters or PhD. Terminology tends to vary from country to country, and even within countries.
Get in touch with a friendly Grad Coach to discuss how we can help you fast-track your dissertation or thesis today. Book a free, no-obligation consultation here.
This post was based on one of our popular Research Bootcamps . If you're working on a research project, you'll definitely want to check this out ...
GRADCOACH youtube and materials are awesome for new researchers. Keep posting such materials so that many new researchers can benefit form them.
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