Thesis Defense
The Final Step Before the Degree
You have submitted your Thesis manuscript, only one final step remains before you earn your doctoral degree: the Thesis defense.
The defense is often a source of stress and uncertainty. However, it is not an examination designed to catch you out. If your dissertation has been deemed acceptable, it means that your supervisor(s) and the members of your jury consider your work to meet the expected standards of scientific quality.
Above all, the defense is an opportunity for scholarly discussion. It enables the examination committee to assess your ability to present your research, discuss your findings critically, justify your methodological and scientific choices, and demonstrate your independence as a researcher.
The defense also marks the culmination of several years of work and provides an excellent opportunity to showcase your research. With appropriate preparation, you can approach this final stage with greater confidence.
This page brings together the essential information you need to prepare for your defense, including:
- the format and procedures for the defense in your faculty;
- the applicable regulations and guidelines;
- practical advice to help you prepare effectively and approach this final stage with confidence and peace of mind.
The Purpose and Significance of the Defense
The Thesis defense enables the jury to:
- verify the authenticity of your research work;
- assess your scientific understanding and mastery of the topic;
- evaluate your ability to engage in critical analysis;
- assess your capacity to develop arguments and respond to questions;
- evaluate your scientific communication skills;
- discuss the limitations of your work and the perspectives it opens up.
Beyond its academic role, the defense also represents a rite of passage: your entry into the scientific community.
The format of the defense varies depending on the faculty. At the Faculty of Science (FS) and the Faculty of Economic Sciences (FSE), it consists of a private defense followed by a public presentation (optional in FSE). At the Faculty of Humanities (FLSH), it takes the form of a dissertation colloquium followed by a public presentation. At the Faculty of Law (FD), the defense is public only. However, certain procedures are common to all faculties.
Private Defense (or Thesis Colloquium)
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- The date of the private defense (or thesis colloquium in FLSH) can only be set once the thesis Jury has been established (see Thesis Jury page).
- It is scheduled by agreement between the supervisor(s), the doctoral candidate, and the jury members, and is then approved by the competent faculty authority (the dean’s office, or the Professors’ Council, depending on the faculty).
- The official invitation is sent by the faculty administration.
- The private defense consists of an oral examination, including a presentation of the research work by the doctoral candidate and a scientific discussion with the Jury.
- At FLSH, the thesis colloquium is limited to a discussion of the Thesis manuscript and feedback from the Jury. At the end of the colloquium, the candidate receives a list of comments to be incorporated into a revised version of the manuscript.
- The Jury prepares a report (At FLSH, the report is not prepared immediately after the colloquium but only after the revised version of the dissertation has been reviewed).
- Depending on the faculty, the final decision to award the doctoral degree is made either by the Jury, the Professors’ Council, or the dean’s office.
- The Jury may request corrections or additional work, to be completed either before or after the defense, within a specified timeframe. Compliance with these requirements is a condition for the acceptance of the Thesis.
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Public Presentation (or Public Defense)
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- The date of the public presentation is set in agreement with the dissertation supervisor(s) and communicated to the faculty’s doctoral thesis coordinator.
- It must be organized within the regulatory timeframe following the private defense, in accordance with the faculty’s requirements.
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The Dissertation Defense : Procedures by Faculty
Each faculty has its own guidelines and practices regarding dissertation defenses. The following sections provide a description of the typical format of the defense in each faculty. The aim is to help doctoral candidates better understand what to expect and prepare for this important stage of their academic journey with confidence and peace of mind.
A successful thesis defense does not happen by chance. Preparation often begins several months before the defense date.
Several Months Before the Defense: Define Your Strategy
- Choose your jury (see Thesis Jury page)
- Attend thesis defenses
Attending several defenses in your faculty, whenever possible, allows you to:
- understand the structure and proceedings of the defense;
- observe different presentation styles;
- identify frequently asked questions;
- reduce uncertainty and apprehension about the process.
Whenever possible, attending a defense chaired by a future member of your jury can be an excellent learning opportunity.
- Talk with recent PhD graduates
Discussions with recent doctoral graduates can help you better understand the practical aspects of the defense and the expectations of the jury.
- Develop skills
Use this period to take advantage of training opportunities offered by the Graduate Campus, or CUSO on:
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- scientific communication;
- public speaking;
- science communication and outreach;
- stress management;
- specific preparation for the thesis defense.
The Final Weeks: Preparing the Defense
- Review your thesis manuscript
Read through your manuscript again in order to:
- refresh your memory of details that may have faded over time;
- identify potential weaknesses and prepare well-supported responses;
- recognize the limitations of your study and prepare how to discuss them.
Adopt a critical perspective on your own work: this approach will help you anticipate discussions with the jury.
- Prepare your oral presentation
The length of the presentation varies depending on the faculty. In all cases, however, the content should enable the jury to understand the key elements of your research:
- the scientific question addressed;
- its significance;
- your methodological approach;
- the main findings;
- the limitations of the study;
- the perspectives opened up by your work.
It is often preferable to focus on the most important findings, or on a specific aspect of your dissertation, rather than attempting to present every element of your research.
You should also prepare a few additional backup slides that can support your answers during the question-and-answer session.
- Organize mock defenses
Practice your presentation in front of:
- your supervisor(s);
- colleagues;
- other doctoral candidates;
- non-specialists.
These rehearsals help you improve the flow of your presentation, stay within the allotted time, build confidence, and practise responding to challenging questions.
In the days immediately before the defense, avoid making continuous changes to your slides.
- Anticipate questions from the jury
The question-and-answer session is a key part of the defense. Questions from the committee generally focus on:
- theoretical and conceptual choices;
- the methodology used;
- the interpretation of results;
- the limitations of the study;
- future research directions or potential applications.
Identify the most vulnerable aspects of your work (limitations, biases, scientific debates, etc.) and prepare well-reasoned responses.
Also consider reviewing recent publications in your field to demonstrate your awareness of current scientific developments.
Finally, prepare concise notes for the most challenging questions. This exercise will help you provide clear, concise, and well-structured answers on the day of the defense.
- Prepare the Practical Details
A few simple checks can help prevent unnecessary stress:
- visit the defense room;
- test the computer equipment;
- prepare several backups of your presentation;
- have a PDF version of your presentation available;
- bring any necessary adapters;
- prepare your outfit the day before;
- have a contingency plan in case of technical problems.
If you are planning a reception or aperitif after the defense, organize it well in advance so that you do not have to worry about it the day before.
Stress Managment
Feeling stressed before a dissertation defense is completely normal. The goal is not to eliminate stress, but rather to transform it into positive energy that supports concentration and performance.
Several techniques can help you manage stress more effectively:
- diaphragmatic breathing;
- mental visualization of the defense;
- Performance Optimization Techniques (POT);
- working on your voice, diction, and posture;
- preparing your eye contact and body language.
The stronger your preparation, the more confident you will feel and the less space stress will take up on the day of the defense.
Answering Questions from the Jury
- Adopting the Right Demeanour
Questions are not intended to put you in difficulty, but rather to encourage scientific discussion.
During the discussion:
- listen carefully to each question until the end;
- take a few seconds to think before answering;
- rephrase the question if necessary;
- provide structured answers;
- remain open to dialogue, even in cases of disagreement.
Avoid both an overly defensive attitude and excessive confidence or arrogance.
- Handling Difficult Questions
There is no need to answer immediately.
You can:
- take a moment to reflect;
- take a sip of water;
- ask for clarification;
- rephrase the question.
If you do not know the answer, it is better to demonstrate intellectual honesty than to improvise.
For example, you can explain:
- what you consider to be the most likely explanation;
- the arguments supporting this interpretation;
- how you would test this hypothesis in future research.
This approach demonstrates your ability to reason as a researcher.
If a question goes beyond the scope of your thesis, simply acknowledge this and explain how it opens up interesting avenues for future research.
- Discussing the Limitations of Your Study
Acknowledging the limitations of your research is a sign of scientific maturity, not an admission of weakness.
Whenever possible, present the main limitations of your work yourself during your presentation. This demonstrates your ability to critically evaluate your own research.
When the committee asks about a specific limitation, an effective response can follow three steps:
- explain why the methodological choice was appropriate at the time it was made;
- clearly describe the limitations resulting from that choice;
- suggest what could be improved or explored in future research.
Always try to transform a limitation into a research perspective.
Avoid, however:
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- claiming that your work has no limitations;
- listing criticisms without putting them into context;
- shifting responsibility onto other people.
And now what?
The dissertation defense marks the culmination of several years of work.
After this stage, it is common to experience a mix of relief, exhaustion, and sometimes a sense of emptiness. This reaction is completely normal.
Take the time to celebrate this achievement, recover from the intensity of the process, and calmly reflect on the next steps in your journey.
Depending on the committee’s decision, some corrections may also be required before your doctoral degree is formally validated.
Faculty-Specific Regulations and Guidelines
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Faculty of Sciences (FS)
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Faculty of Humanities (FLSH)
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Faculty of Law (FD)
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Faculté Of Economic Sciences (FSE)
Online Resources
- Viva cards : A collection of cards featuring typical questions asked by dissertation committees, organized by category.
- The 52 most frequently asked questions by the jury, by category.
- The PhD Knowledge Base : A comprehensive blog offering articles, thesis writing templates, and survival packs for doctoral candidates.
- James Hayton’s Blog :A widely cited resource providing advice on academic mindset, scholarly practice, and how to respond to challenging questions.
Bibliographic References
- Stepping Stones to Achieving your Doctorate (Trafford & Leshem, 2008)
- The Unwritten Rules of PhD Research (Petre & Rugg, 2010) : A guide to the implicit expectations of dissertation committees and common mistakes to avoid.
- How to Survive Your Viva (Rowena Murray, 2003) : UA classic book on psychological and intellectual preparation for the oral defense.
- Succeeding with your Doctorate (Wellington et al., 2005) : Provides methods for transforming a thesis into a successful oral presentation.
- The Research Student’s Guide to Success (Pat Cryer, 2000).
