Thesis and viva defence slides: what to show the panel

A thesis defence or viva is not like other presentations. Your audience has usually read your work, sometimes very closely. They aren’t there to be impressed by your slides. They’re there to understand your thinking, test your reasoning and check that the work is really yours.

That changes what good slides look like. You don’t need to fit the whole thesis into twenty minutes. You need to give the panel a clear map of your work and show that you understand its strengths and its limits.

Every university and department has its own format, so start with the rules you’ve been given: time limit, whether slides are expected, and who will be on the panel. Your supervisor is the best person to ask about anything that isn’t written down.

What the panel is trying to find out

It helps to think about the questions a panel is likely to have in mind as you talk:

• What question did this work set out to answer, and why does it matter?
• How did you go about answering it, and why that way?
• What did you find?
• What does it add to what was already known?
• Where are the weaknesses, and do you see them?

Your slides should make each of these easy to answer. If a slide doesn’t help with any of them, it probably belongs in the thesis, not the presentation.

A structure to start from

For a typical defence presentation, this order works well:

1. Title, with your name, thesis title and supervisor.
2. The research question, stated in one clear sentence.
3. Why it matters: the gap or problem your work addresses.
4. Approach: your method, in plain terms, with the main choices you made.
5. Key findings, one slide each, usually three or four.
6. Contribution: what your work adds.
7. Limitations and future work, stated honestly.
8. Conclusion, returning to the research question.

Adapt this to your field and your time limit. A science defence may need more on method. A humanities viva may have no slides at all, or only a few. Once the order is settled, an AI tool for building presentations can help you set it out as a first draft to trim.

Show your reasoning, not just your results

Panels often spend the most time on why you did things, not what you did. Where you made an important choice, such as a sample, a method, a theoretical framework or a dataset, show it on a slide and give one line on why. “We used interviews rather than a survey because we needed to understand how decisions were made” invites a good discussion. A slide that just says “Method: interviews” invites the question anyway, without your framing.

Be ready to explain the alternatives you considered and why you rejected them. You don’t need them all on slides, but a backup slide for each major choice is worth having.

Keep the slides lighter than the thesis

The most common mistake is trying to put the thesis on screen: dense paragraphs, full tables, every chart from every chapter. The panel already has the thesis. Repeating it in small print makes the presentation harder to follow and leaves less time for discussion.

A few guidelines:

• One finding per slide, with a title that states it.
• One chart or small table per slide, chosen to show the finding clearly.
• Short phrases, not paragraphs. Say the detail; don’t show it.
• Readable labels on every chart, large enough to see from across the room.

If you’re unsure how much text is too much, the presentation rubric gives you a way to grade your own slides for clarity and readability.

Be open about the limitations

It can feel risky to put weaknesses on a slide. In practice, naming them yourself is usually the stronger position. It shows you understand your work well enough to see where it falls short, and it lets you frame the limitation before someone else does.

Keep it calm and specific. “The sample was drawn from two colleges in one city, so the results may not hold elsewhere” is honest and useful. Follow it with what would address it: a larger study, a different method, more data.

Prepare backup slides

Backup slides sit after your conclusion and only come out if a question needs them. They’re one of the best ways to prepare for a defence. Good candidates:

• extra detail on your method
• results you mention but don’t show in full
• alternative analyses you ran
• key sources or definitions the panel may ask about

Number your slides, or keep a list of backups with their numbers, so you can jump to the right one quickly.

Handling questions

Questions are the heart of most defences. A few habits help:

• Pause before answering. It’s fine to take a moment.
• Check you’ve understood. If a question is unclear, ask for it to be rephrased.
• Answer the question asked, then stop.
• It’s acceptable to say you don’t know, then explain how you’d find out.

Practise with friends, colleagues or your supervisor. Ask them to push on the weakest parts of your work, not the strongest.

A final review

A few days before, go through your deck and check:

• Is the research question stated clearly near the start?
• Does each main choice in your method have a reason?
• Does each finding have its own slide, with a title that states it?
• Are all chart labels readable at a distance?
• Are limitations named honestly?
• Do your backup slides cover the questions you’re most worried about?
• Does the presentation fit the time with room to spare?

Then rehearse it out loud, with a timer, at least twice. For the practical checks on the day itself, such as the room, the equipment and timing, see the presentation checklist to run before any big talk.

You know this work better than anyone else in the room. Good slides just help you show it.