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The words ‘ dissertation ’ and ‘thesis’ both refer to a large written research project undertaken to complete a degree, but they are used differently depending on the country:
The main difference is in terms of scale – a dissertation is usually much longer than the other essays you complete during your degree.
Another key difference is that you are given much more independence when working on a dissertation. You choose your own dissertation topic , and you have to conduct the research and write the dissertation yourself (with some assistance from your supervisor).
Dissertation word counts vary widely across different fields, institutions, and levels of education:
However, none of these are strict guidelines – your word count may be lower or higher than the numbers stated here. Always check the guidelines provided by your university to determine how long your own dissertation should be.
At the bachelor’s and master’s levels, the dissertation is usually the main focus of your final year. You might work on it (alongside other classes) for the entirety of the final year, or for the last six months. This includes formulating an idea, doing the research, and writing up.
A PhD thesis takes a longer time, as the thesis is the main focus of the degree. A PhD thesis might be being formulated and worked on for the whole four years of the degree program. The writing process alone can take around 18 months.
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Caulfield, J. (2022, May 05). What Is a Dissertation? | 5 Essential Questions to Get Started. Scribbr. Retrieved 2 July 2024, from https://www.scribbr.co.uk/thesis-dissertation/what-is-a-dissertation/
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All thesis-option graduate students at Purdue must deposit the final products of their research with the Purdue University Graduate School Thesis & Dissertation Office. The Thesis & Dissertation Office will help ensure that all pre-requisites for deposit have been fulfilled and that your thesis or dissertation meets the quality standards established by the Graduate Council Standing Committee on Theses and Dissertations.
Students who are working with data that is subject to EAR, ITAR, DFARS Clause 252.204-7012, or other controlled data need to follow a specific process to submit their thesis or dissertation. This process is outlined at Guidance Document - Controlled Thesis Submission Process .
Your Thesis/Dissertation review MUST be an in-person review with a member of the Thesis Office. Email [email protected] to schedule.
Your document is NOT to be submitted through the Hammer repository.
Your document is NOT to be run through iThenticate.
If any students, faculty, or staff have questions, do not hesitate to contact Nicole Barr or Elizabeth Wagner .
1. complete the electronic thesis acceptance form (etaf) and required surveys.
A helpful guide to initiating your ETAF is available here: Student Instructions for Initiating the Thesis Acceptance Form (PDF) .
West Lafayette Campus West Lafayette candidates will pay the deposit fee through their myPurdue accounts. The thesis fee will appear in a candidate's student account 5-10 business days after the HammerRR submission is approved.
Regional Campuses Calumet and Fort Wayne candidates will pay their fees to their local bursar's office as part of the clearance process by their regional campus thesis advisor.
IUPUI Campus IUPUI candidates will receive an emailed bill following their successful deposit.
Ernest C. Young Hall, Room 170 | 155 S. Grant Street, West Lafayette, IN 47907-2114 | 765-494-2600
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Published on September 6, 2022 by Tegan George and Shona McCombes. Revised on November 20, 2023.
The conclusion is the very last part of your thesis or dissertation . It should be concise and engaging, leaving your reader with a clear understanding of your main findings, as well as the answer to your research question .
In it, you should:
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Discussion vs. conclusion, how long should your conclusion be, step 1: answer your research question, step 2: summarize and reflect on your research, step 3: make future recommendations, step 4: emphasize your contributions to your field, step 5: wrap up your thesis or dissertation, full conclusion example, conclusion checklist, other interesting articles, frequently asked questions about conclusion sections.
While your conclusion contains similar elements to your discussion section , they are not the same thing.
Your conclusion should be shorter and more general than your discussion. Instead of repeating literature from your literature review , discussing specific research results , or interpreting your data in detail, concentrate on making broad statements that sum up the most important insights of your research.
As a rule of thumb, your conclusion should not introduce new data, interpretations, or arguments.
Depending on whether you are writing a thesis or dissertation, your length will vary. Generally, a conclusion should make up around 5–7% of your overall word count.
An empirical scientific study will often have a short conclusion, concisely stating the main findings and recommendations for future research. A humanities dissertation topic or systematic review , on the other hand, might require more space to conclude its analysis, tying all the previous sections together in an overall argument.
Your conclusion should begin with the main question that your thesis or dissertation aimed to address. This is your final chance to show that you’ve done what you set out to do, so make sure to formulate a clear, concise answer.
An empirical thesis or dissertation conclusion may begin like this:
A case study –based thesis or dissertation conclusion may begin like this:
In the second example, the research aim is not directly restated, but rather added implicitly to the statement. To avoid repeating yourself, it is helpful to reformulate your aims and questions into an overall statement of what you did and how you did it.
Your conclusion is an opportunity to remind your reader why you took the approach you did, what you expected to find, and how well the results matched your expectations.
To avoid repetition , consider writing more reflectively here, rather than just writing a summary of each preceding section. Consider mentioning the effectiveness of your methodology , or perhaps any new questions or unexpected insights that arose in the process.
You can also mention any limitations of your research, but only if you haven’t already included these in the discussion. Don’t dwell on them at length, though—focus on the positives of your work.
You may already have made a few recommendations for future research in your discussion section, but the conclusion is a good place to elaborate and look ahead, considering the implications of your findings in both theoretical and practical terms.
When making recommendations for further research, be sure not to undermine your own work. Relatedly, while future studies might confirm, build on, or enrich your conclusions, they shouldn’t be required for your argument to feel complete. Your work should stand alone on its own merits.
Just as you should avoid too much self-criticism, you should also avoid exaggerating the applicability of your research. If you’re making recommendations for policy, business, or other practical implementations, it’s generally best to frame them as “shoulds” rather than “musts.” All in all, the purpose of academic research is to inform, explain, and explore—not to demand.
Make sure your reader is left with a strong impression of what your research has contributed to the state of your field.
Some strategies to achieve this include:
Again, avoid simply repeating what you’ve already covered in the discussion in your conclusion. Instead, pick out the most important points and sum them up succinctly, situating your project in a broader context.
The end is near! Once you’ve finished writing your conclusion, it’s time to wrap up your thesis or dissertation with a few final steps:
Here is an example of how you can write your conclusion section. Notice how it includes everything mentioned above:
V. Conclusion
The current research aimed to identify acoustic speech characteristics which mark the beginning of an exacerbation in COPD patients.
The central questions for this research were as follows: 1. Which acoustic measures extracted from read speech differ between COPD speakers in stable condition and healthy speakers? 2. In what ways does the speech of COPD patients during an exacerbation differ from speech of COPD patients during stable periods?
All recordings were aligned using a script. Subsequently, they were manually annotated to indicate respiratory actions such as inhaling and exhaling. The recordings of 9 stable COPD patients reading aloud were then compared with the recordings of 5 healthy control subjects reading aloud. The results showed a significant effect of condition on the number of in- and exhalations per syllable, the number of non-linguistic in- and exhalations per syllable, and the ratio of voiced and silence intervals. The number of in- and exhalations per syllable and the number of non-linguistic in- and exhalations per syllable were higher for COPD patients than for healthy controls, which confirmed both hypotheses.
However, the higher ratio of voiced and silence intervals for COPD patients compared to healthy controls was not in line with the hypotheses. This unpredicted result might have been caused by the different reading materials or recording procedures for both groups, or by a difference in reading skills. Moreover, there was a trend regarding the effect of condition on the number of syllables per breath group. The number of syllables per breath group was higher for healthy controls than for COPD patients, which was in line with the hypothesis. There was no effect of condition on pitch, intensity, center of gravity, pitch variability, speaking rate, or articulation rate.
This research has shown that the speech of COPD patients in exacerbation differs from the speech of COPD patients in stable condition. This might have potential for the detection of exacerbations. However, sustained vowels rarely occur in spontaneous speech. Therefore, the last two outcome measures might have greater potential for the detection of beginning exacerbations, but further research on the different outcome measures and their potential for the detection of exacerbations is needed due to the limitations of the current study.
I have clearly and concisely answered the main research question .
I have summarized my overall argument or key takeaways.
I have mentioned any important limitations of the research.
I have given relevant recommendations .
I have clearly explained what my research has contributed to my field.
I have not introduced any new data or arguments.
You've written a great conclusion! Use the other checklists to further improve your dissertation.
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In a thesis or dissertation, the discussion is an in-depth exploration of the results, going into detail about the meaning of your findings and citing relevant sources to put them in context.
The conclusion is more shorter and more general: it concisely answers your main research question and makes recommendations based on your overall findings.
While it may be tempting to present new arguments or evidence in your thesis or disseration conclusion , especially if you have a particularly striking argument you’d like to finish your analysis with, you shouldn’t. Theses and dissertations follow a more formal structure than this.
All your findings and arguments should be presented in the body of the text (more specifically in the discussion section and results section .) The conclusion is meant to summarize and reflect on the evidence and arguments you have already presented, not introduce new ones.
For a stronger dissertation conclusion , avoid including:
Your conclusion should leave the reader with a strong, decisive impression of your work.
The conclusion of your thesis or dissertation shouldn’t take up more than 5–7% of your overall word count.
The conclusion of your thesis or dissertation should include the following:
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George, T. & McCombes, S. (2023, November 20). How to Write a Thesis or Dissertation Conclusion. Scribbr. Retrieved July 2, 2024, from https://www.scribbr.com/dissertation/write-conclusion/
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Revised on April 16, 2024. A thesis is a type of research paper based on your original research. It is usually submitted as the final step of a master's program or a capstone to a bachelor's degree. Writing a thesis can be a daunting experience. Other than a dissertation, it is one of the longest pieces of writing students typically complete.
What is a thesis statement? A thesis statement summarizes the central points of your essay. It is a signpost telling the reader what the essay will argue and why. The best thesis statements are: Concise: A good thesis statement is short and sweet—don't use more words than necessary. State your point clearly and directly in one or two sentences.
A thesis is an in-depth research study that identifies a particular topic of inquiry and presents a clear argument or perspective about that topic using evidence and logic. Writing a thesis showcases your ability of critical thinking, gathering evidence, and making a compelling argument. Integral to these competencies is thorough research ...
A thesis statement: tells the reader how you will interpret the significance of the subject matter under discussion. is a road map for the paper; in other words, it tells the reader what to expect from the rest of the paper. directly answers the question asked of you. A thesis is an interpretation of a question or subject, not the subject itself.
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 ...
A good thesis statement needs to do the following: Condense the main idea of your thesis into one or two sentences. Answer your project's main research question. Clearly state your position in relation to the topic. Make an argument that requires support or evidence.
Craft a convincing dissertation or thesis research proposal. Write a clear, compelling introduction chapter. Undertake a thorough review of the existing research and write up a literature review. Undertake your own research. Present and interpret your findings. Draw a conclusion and discuss the implications.
A good thesis has two parts. It should tell what you plan to argue, and it should "telegraph" how you plan to argue—that is, what particular support for your claim is going where in your essay. Steps in Constructing a Thesis. First, analyze your primary sources. Look for tension, interest, ambiguity, controversy, and/or complication.
Thesis. Your thesis is the central claim in your essay—your main insight or idea about your source or topic. Your thesis should appear early in an academic essay, followed by a logically constructed argument that supports this central claim. A strong thesis is arguable, which means a thoughtful reader could disagree with it and therefore ...
The dissertation or thesis is a scholarly treatise that substantiates a specific point of view as a result of original research that is conducted by students during their graduate study. At Cornell, the thesis is a requirement for the receipt of the M.A. and M.S. degrees and some professional master's degrees.
The thesis statement is the brief articulation of your paper's central argument and purpose. You might hear it referred to as simply a "thesis." Every scholarly paper should have a thesis statement, and strong thesis statements are concise, specific, and arguable. Concise means the thesis is short: perhaps one or two sentences for a shorter paper.
A thesis statement is one to three sentences in the introduction of an academic essay outlining what the reader can expect. It is an argument, or claim, that will be defended through your research. A strong thesis statement identifies the topic to be discussed, summarizes the main arguments, and persuades your audience to continue reading.
Thesis statements and dissertations are vital in academic writing, each serving a distinct purpose. A thesis statement is a brief, clear sentence that sets the direction for your paper and is crucial for structuring and articulating your argument. In contrast, a dissertation is an extensive piece of original research for a PhD, involving in ...
How to Tell a Strong Thesis Statement from a Weak One 1. A strong thesis statement takes some sort of stand. Remember that your thesis needs to show your conclusions about a subject. For example, if you are writing a paper for a class on fitness, you might be asked to choose a popular weight-loss product to evaluate. Here are two thesis statements:
A thesis statement . . . Makes an argumentative assertion about a topic; it states the conclusions that you have reached about your topic. Makes a promise to the reader about the scope, purpose, and direction of your paper. Is focused and specific enough to be "proven" within the boundaries of your paper. Is generally located near the end ...
Revised on 5 May 2022. A dissertation is a large research project undertaken at the end of a degree. It involves in-depth consideration of a problem or question chosen by the student. It is usually the largest (and final) piece of written work produced during a degree. The length and structure of a dissertation vary widely depending on the ...
Overview of the structure. To help guide your reader, end your introduction with an outline of the structure of the thesis or dissertation to follow. Share a brief summary of each chapter, clearly showing how each contributes to your central aims. However, be careful to keep this overview concise: 1-2 sentences should be enough.
The Thesis & Dissertation Office will help ensure that all pre-requisites for deposit have been fulfilled and that your thesis or dissertation meets the quality standards established by the Graduate Council Standing Committee on Theses and Dissertations.
ETDs (Electronic Theses and Dissertations) are electronic versions of traditional print theses and dissertations. Gumberg Library collects students' ETDs in order to add them to the library's resources, much like they collected print theses and dissertations in the past.
Dissertation & Thesis Outline | Example & Free Templates. Published on June 7, 2022 by Tegan George.Revised on November 21, 2023. A thesis or dissertation outline is one of the most critical early steps in your writing process.It helps you to lay out and organize your ideas and can provide you with a roadmap for deciding the specifics of your dissertation topic and showcasing its relevance to ...
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When starting your thesis or dissertation process, one of the first requirements is a research proposal or a prospectus. It describes what or who you want to examine, delving into why, when, where, and how you will do so, stemming from your research question and a relevant topic. The proposal or prospectus stage is crucial for the development ...
Step 1: Answer your research question. Step 2: Summarize and reflect on your research. Step 3: Make future recommendations. Step 4: Emphasize your contributions to your field. Step 5: Wrap up your thesis or dissertation. Full conclusion example. Conclusion checklist. Other interesting articles.