Si vous préparez votre viva, vous avez probablement passé beaucoup de temps à vous inquiéter de ce que vos examinateurs vous demanderont. Mais la question la plus utile est : que recherchent-ils vraiment ?
If you're preparing for your viva, you've probably spent a lot of time worrying about what your examiners will ask. But the more useful question is: what are they actually looking for?
Understanding this changes everything. Once you know what examiners are trying to assess, you can [prepare](/blog/how-to-prepare-for-your-viva-a-comprehensive-guide) with purpose rather than panic. And the good news is that what they're looking for is far more straightforward than most students assume.
I completed my DPhil at Oxford in art history, and I've spent a lot of time since then thinking about the viva process – both from the candidate's perspective and from the examiner's side. Here's what I wish someone had told me before mine.
Let's start with the most important thing: examiners are not there to trip you up. The viva is not an interrogation. It's a focused discussion about your research, and most examiners go into it genuinely hoping the candidate will do well.
Your examiners have already read your thesis before the viva takes place. In many universities, they've each already formed a preliminary view of your work before the viva begins. By the time you sit down together, they already have a good sense of whether your work meets the standard for a doctorate. The viva is their chance to confirm that assessment – not to ambush you.
Many examiners will actively try to put you at ease in the opening minutes. Some will start with small talk. Others will make it explicitly clear that the viva is a conversation, not a grilling. As one examiner recalled in Penny Tinkler and Carolyn Jackson's A Guide for Internal and External PhD Examiners (2008): "Unless you give me reason to believe that you did not write this thesis or conduct this research on your own, there is nothing you can say in this viva that will cause you to fail your PhD." That's more typical of examiner attitudes than most students realise.
While every viva is different, examiners are broadly assessing five areas. If you can demonstrate these, you're in a strong position.
This is the fundamental purpose of the viva. Examiners need to confirm that you conducted the research, that you wrote the thesis, and that you understand it thoroughly. This doesn't mean you need to have every page memorised. It means you should be able to talk fluently about your research decisions, your methodology, and your findings without hesitating or deferring to others.
If your supervisor contributed significantly to shaping a particular argument or your methodology, that's fine – but you should be able to explain why that approach was adopted and what alternatives you considered. You need to own your work when you talk about it.
Every doctoral thesis must make an original contribution to knowledge. Examiners will want you to articulate clearly what yours is. You should be able to explain in one or two sentences what your research adds to the field, why it matters, and how it advances existing work.
This question might not always be phrased directly. You might be asked "Why is this research important?", "What were your main findings?", or "What would be lost if this thesis didn't exist?" All of these are variations on the same theme: what is your contribution, and can you defend it?
Prepare a clear, concise answer to this question. If you can't explain your contribution in plain language, that's a sign you need to think about it more deeply before the viva.
Examiners expect you to know the landscape of your discipline. Not exhaustively – nobody expects you to have read every paper ever published in your area. But you should be familiar with the key works, the major debates, and where your research sits within them.
This often comes up through questions about your literature review. You might be asked why you cited certain scholars and not others, whether you agree with a particular position in the literature, or how your findings relate to existing theories. The goal isn't to test your memory – it's to see whether you've engaged critically with the field rather than just summarised it.
If there's a significant piece of work published after you submitted your thesis, it's worth being aware of it. Examiners occasionally ask whether recent developments affect your conclusions. You don't need to have read everything, but showing awareness of the broader conversation demonstrates the intellectual engagement with your field that they will be looking for.
Your methodology is likely to be one of the most closely examined parts of your thesis. Examiners want to know that you understand not just what you did, but why you did it that way, what the alternatives were, and what the limitations of your approach are.
[Common questions](/blog/50-common-viva-questions-and-how-to-answer-them) in this area include: "Why did you choose this method over others?", "What were the main challenges you faced in your data collection?", and "If you were starting this research again, would you do anything differently?"
The last question is particularly important. It's not a trap – it's an invitation to show self-awareness. Every piece of research has its limitations, and examiners know this. What they want to see is that you recognise those limitations and can reflect honestly on what you might improve. Trying to pretend your methodology was flawless is far more damaging than openly acknowledging its constraints.
The viva is ultimately a conversation between experts. Examiners are assessing whether you can discuss your work clearly, respond to challenges thoughtfully, and engage in academic dialogue at a doctoral level.
This doesn't mean you need to be a polished public speaker. It's perfectly normal to pause, to think before answering, to say "That's a good question, let me think about that." Examiners aren't marking you on eloquence or presentation skills. They're looking for evidence that you can think critically about your work and articulate your reasoning under pressure.
What examiners don't want to see is evasion. If you don't know the answer to something, say so. If you disagree with a premise in the question, explain why. The viva rewards honesty and intellectual courage far more than it rewards performance.
It's worth knowing what examiners are not assessing, because many students waste preparation time on the wrong things.
They don't expect perfection. Every thesis has weaknesses, and examiners know this. The point is not to have produced a flawless piece of work – it's to show that you understand where the weaknesses are and how they could be addressed.
Don't worry about sounding nervous. Examiners have examined many students and they know the viva is stressful. Stumbling over a word, asking for a question to be repeated, or taking a moment to collect your thoughts are all completely normal. None of these things will count against you.
They don't expect you to know everything. Your thesis covers a specific area in significant depth. Examiners may ask questions that push at the boundaries of your knowledge – that's part of the process. But they're not expecting encyclopaedic knowledge of your entire discipline. They're expecting deep knowledge of your research and reasonable familiarity with the context around it.
In the UK, the vast majority of students who sit their viva pass. The most common outcome is a pass with minor corrections (which is what I was given) – small amendments to the thesis that need to be completed within a set timeframe, usually a few months. This is completely normal and is not a sign that your viva went badly.
A pass without corrections is rare but does happen. Major corrections are less common and involve more substantial revisions, but they still represent a pass – you're being given the opportunity to bring the thesis up to the necessary standard. An outright fail is extremely unusual, mainly because it is not in the interests of supervisors to put students forward for examination until they're confident the thesis is ready. By putting you forward, they are endorsing your candidacy.
The key thing to understand (and something that I did not fully appreciate at the time of mine) is that the outcome of your viva is largely determined before it begins. The examiners have read your thesis thoroughly and formed a view, and the viva confirms or adjusts that view; but it rarely overturns it entirely. A good viva can improve your outcome (for instance, reducing expected corrections), and a poor viva can worsen it, but the thesis itself does the heavy lifting.
Now that you know what examiners are looking for, you can prepare with focus.
Practise articulating your original contribution. Say it out loud, in one or two sentences, until it feels natural. If you can't do this confidently, keep refining it.
Reread your thesis with fresh eyes. Make notes on anything that strikes you as a potential weakness or an area where your reasoning could be stronger. If you notice it, your examiners probably will too – and being prepared to discuss it honestly is far better than being caught off guard.
Think about your methodology critically. Why did you choose your approach? What were the trade-offs? What would you do differently with the benefit of hindsight? Having thoughtful answers to these questions shows maturity as a researcher.
Know your field. Revisit the key texts in your literature review. Make sure you can explain not just what other scholars have argued, but where you agree, where you diverge, and why.
See the [50 questions examiners most commonly ask](/blog/50-common-viva-questions-and-how-to-answer-them).
And finally, practise the format itself. The viva is unlike any other academic assessment. Having experienced the format before – even in a simulated environment – reduces the novelty and lets you focus on the substance rather than the stress.
Want to experience a realistic mock viva based on your own thesis? [See our plans](/pricing).