The Research Skills That Actually Matter — And How the PhD Viva Exposes Every Gap
The oral examination isn't just a hurdle to cross. It's one of the most carefully designed assessments of scientific competence ever created. Here's what examiners are really testing — and what every researcher needs to develop long before they enter that room.
There is a long list of things researchers are told they need to develop. Critical thinking. Research design. Data analysis. Academic writing. Presentation skills. Literature synthesis. These lists exist in career development frameworks, doctoral programme handbooks, and postgraduate training courses at universities worldwide. What they rarely tell you is how to tell which skills actually matter most, or how to know whether you really have them.
The PhD viva — the oral examination of a doctoral thesis — turns out to be one of the clearest answers to both questions. It is, as Cortazzi and Jin (2021) put it, "an intellectual encounter at a high level." The viva is specifically designed to assess whether a candidate possesses the qualities of a research scientist. Not whether they have read enough papers, but whether they can think as a scientist: argue, defend, contextualise, and engage critically with their own work and the broader field.
What examiners test in the viva is not arbitrary. Research on examiner practices across multiple countries — Malaysia, the UK, New Zealand, Belgium, Ecuador, the Netherlands — reveals a consistent set of competencies that doctoral examiners evaluate. These same competencies are precisely the skills that distinguish a capable researcher from someone who has completed a research project. And they apply far beyond the PhD.
What Examiners Are Actually Assessing
Before diving into the individual skills, it helps to understand the framework that examiners use. Research by Tan (2023) with doctoral examiners in Malaysia, and by Watts (2012) drawing on UK doctoral practice, identifies four core purposes that the viva examination serves. Each maps directly onto a cluster of research skills.
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Gatekeeping: Ensuring the work meets the standards of the discipline — original contribution, methodological soundness, scholarly integrity. This tests research design, methodological thinking, and originality.
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Empowerment: Assessing whether the candidate has mastered their subject area and can position their work within the broader scholarly context. This tests depth of field knowledge and critical thinking.
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Dialogue: Initiating genuine intellectual exchange about the research. This tests argumentation, the ability to defend positions under challenge, and the capacity to engage with critique constructively.
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Enculturation: Fostering membership of the disciplinary community. This tests communication, the ability to speak the language of the field, and scholarly identity.
These four purposes — gatekeeping, empowerment, dialogue, and enculturation — form the architecture of the viva. But they also form the architecture of good scientific practice generally. A researcher who develops these qualities is not just preparing for an oral examination. They are becoming a genuine scientist.
The Key Research Skills — With What the Evidence Says About Each
Knowing Your Research With Forensic Depth
This seems obvious until you see what it actually requires. Knowing your research means being able to explain every methodological choice you made and why, trace the intellectual lineage of your theoretical framework, describe what each finding means and what it doesn't mean, and account for the limitations of your work as thoroughly as you account for its contributions.
McNeill et al. (2024) describe the viva as an oral performance requiring content, language, and attitude — but content comes first. Examiners in Tan's (2023) study describe their role as ensuring candidates demonstrate mastery of the research subject. Smith (2014) is explicit: examiners expect candidates to know their thesis better than anyone else in the room, including the examiners themselves.
The practical implication: deep knowledge of your own research cannot be crammed before a deadline. It accumulates through the practice of explaining your work to different audiences over time — supervisors, peers, non-specialists, conference audiences. Researchers who regularly articulate their work in different registers develop this depth more reliably than those who write in isolation.
Locating Your Research in the Broader Field
One of the most consistent themes across the viva literature is the distinction between knowing your own research and knowing how it relates to the field. Cortazzi and Jin (2021) identify this as one of the core categories of viva questioning: examiners ask not just what you found, but how it fits with, extends, challenges, or contradicts existing knowledge.
Watts (2012) notes that examiners expect candidates to be able to "locate PhD research in the broader context." This requires having done genuine critical engagement with the literature — not just having read papers, but having understood the debates, identified the fault lines, and positioned your own work in relation to them.
This skill is why the literature review is not merely a prerequisite but a genuinely important piece of intellectual work. A researcher who has mapped their field properly knows not just what has been done but what remains to be done, why it matters, and how their own contribution sits within that landscape.
Defending a Position Under Intellectual Pressure
This is the skill that most clearly distinguishes a scientist from a student who has done scientific work. Watts (2012) identifies being "articulate under stress" as a core credential of being a professional researcher. Potter (2006), cited by Watts, identifies the ability to defend one's work as one of the three essential functions of the viva.
Defending a position doesn't mean refusing to acknowledge limitations or stubbornly insisting you're right when challenged. It means being able to explain the reasoning behind your choices, respond to a counter-argument with a counter-argument of your own, and distinguish between a methodological weakness you have acknowledged and addressed versus one that genuinely undermines your findings.
McNeill et al. (2024) describe the core of the viva as "debate, the use of evidence, and the justification for a statement or opinion delivered orally." These are not examination-specific skills. They are the tools of scientific discourse. A researcher who cannot defend their position in a structured conversation will also struggle to defend it in peer review, at conference, or in front of funders.
The viva is not only an oral examination but also a time for a candidate to give individual voice in a live performance. It is more of a sustained dialogue with committed participation on all sides. — Cortazzi & Jin (2021)
Critical Self-Assessment of Your Own Work
Examiners in multiple contexts report that they actively probe candidates on the limitations of their research. Tan's (2023) Malaysian study found that examiners ask candidates to clarify "obscurities and areas of weakness." Smith (2014) advises candidates to know their weaknesses as well as their strengths, because examiners will find them — and the candidate who finds them first demonstrates a more sophisticated understanding of their own research.
Critical self-assessment is not self-deprecation. It's the intellectual honesty to say: here is what my study can claim, and here is what it cannot. Here is what my sample allows me to conclude, and here is what a different study design might have added. This is also, not coincidentally, exactly what good peer reviewers do and what good scientists do when designing their next study.
Methodological Justification and Research Design Literacy
The ability to justify why you chose your methodology — not just what it is, but why it was the right choice for your question — is one of the most frequently tested competencies in any viva. Examiners want to know: why this design over another? Why this sample? Why this analytical approach? What assumptions does your method carry, and are you aware of them?
This skill requires what Lantsoght (2022), studying doctoral defense preparation methods across 204 candidates in an international survey, calls understanding the format and substance of your defense at a deep level — not just the surface presentation. Candidates who had done mock defenses and preparatory courses performed better in her study, not because they had memorised answers, but because they had practised thinking aloud about their methodological choices under questioning.
The broader principle is this: methodological literacy is not about knowing the name of your method. It's about understanding its logic well enough to explain it, defend it, and recognise where it falls short.
Communicating Research Clearly to Expert Audiences
The viva is an oral performance. Cortazzi and Jin (2021) are explicit that "a successful defence is about content, but it is also about language and attitude." Examiners assess not just whether a candidate knows their research but whether they can communicate that knowledge clearly, precisely, and with appropriate scholarly register.
McNeill et al. (2024) describe how answer structure, framing, and rhetorical choices all affect how confident and competent a candidate appears — and these impressions matter. Watts (2012) discusses the importance of building confidence through full role-play preparation, noting that many candidates underperform in the viva not because of gaps in knowledge but because of anxiety that disrupts the quality of their communication.
Scientific communication is a learnable skill. It improves with deliberate practice: presenting at lab meetings, writing for different audiences, explaining your research to non-specialists, and engaging in structured dialogue with peers and mentors about your work.
Understanding the Contribution and Implications of Your Research
What does your research actually contribute to human knowledge? This sounds like a broad philosophical question, but it's one of the most concretely assessed competencies in the viva. Examiners routinely ask candidates to articulate the original contribution of their work: what didn't exist before this research, what can the field now do or know that it couldn't before, and what are the next questions that this research opens up?
Tan (2023) identifies this as central to the examiner's gatekeeping function: assessing the "extent to which the research advances the existing knowledge." The ability to articulate this clearly is not just important for the viva. It's essential for grant writing, publication, science communication, and building a research career at any level.
Cortazzi and Jin (2021) note that the best candidates don't just describe their contribution — they situate it: here is why this gap existed, here is what I did to address it, here is what it means for the field and potentially for practice. That three-part structure is the foundation of any compelling research communication.
Preparation as an Active, Iterative Process
Research is a long-term skill-building endeavour, not a series of one-off tasks. Cortazzi and Jin (2021) argue explicitly that viva preparation — and by extension, the development of doctoral research qualities — "should begin early, certainly not just immediately after thesis submission." They advocate for using key viva questions as a continuous formative process throughout the PhD, not as a last-minute checklist.
Lantsoght's (2022) quantitative study of 204 doctoral candidates across multiple countries found that the most effective preparation method was the mock defense, followed by a preparatory course. Simply reading the thesis or making a presentation was far less effective. The active simulation of being questioned about your work, and being required to respond in real time, develops skills that passive reading cannot.
The lesson for researchers at any stage: the skills that matter most are developed through practice, feedback, and iterative refinement. This is as true for research design as it is for scientific writing, and as true for oral communication as it is for statistical analysis. Regular engagement with expert feedback, structured critique, and deliberate practice are what separate good researchers from great ones.
How These Skills Map Across Research Career Stages
These eight skills are not exclusively PhD skills. They are the skills that define competent research practice at every level. Here's how they distribute across career stages:
| Research Skill | PhD Stage | Early Career | Senior Researcher |
|---|---|---|---|
| Deep knowledge of own research | Foundation | Deepens | Extended across portfolio |
| Field positioning & lit synthesis | Core skill | Grant applications | Shapes research agenda |
| Intellectual argumentation | Viva essential | Peer review & debate | Leadership & influence |
| Critical self-assessment | Thesis quality | Manuscript revision | Research integrity |
| Methodological justification | Design phase | Publishing & review | Mentoring & evaluating |
| Scientific communication | Developing | Conferences, papers | Policy, public, media |
| Contribution articulation | Viva & writing | Grant writing | Impact assessment |
| Active iterative preparation | Throughout PhD | CPD, mentorship | Continuous learning |
How to Actually Develop These Skills
Knowledge of what skills matter is only useful if paired with a genuine approach to developing them. The viva literature is clear on what works and what doesn't. Passive approaches — reading your thesis, reviewing your notes — are less effective than active, dialogic approaches.
What the evidence recommends
- ✓Mock defenses and practice vivas. Lantsoght (2022) found this to be the single most effective preparation method. The principle generalises: any practice that involves being questioned and required to respond in real time develops the skills faster than solitary preparation.
- ✓Working through key questions iteratively with a supervisor or mentor. Cortazzi and Jin (2021) developed a repertoire of 60 generic viva questions specifically to be used as a formative tool throughout the PhD — not just at the end. Used iteratively, questions like "what is your original contribution?" and "why did you choose this methodology?" shape the researcher's thinking progressively.
- ✓Regular presentation to different audiences. Explaining your research to non-specialists forces you to articulate what your work actually does in plain terms. Explaining it to specialists forces you to defend your methodological choices. Both sharpen different dimensions of the same core competencies.
- ✓Engaging with expert feedback on your research, not just your writing. There is a significant difference between getting feedback on whether your prose is clear and getting feedback on whether your research design is defensible. The latter develops methodological thinking in ways the former cannot.
Research Decode's eSupervision model is built around exactly this kind of iterative, expert-led engagement. Domain experts engage with your actual research — asking the hard questions that examiners ask, pushing on your methodological choices, and helping you articulate your contribution clearly. It's not a substitute for your supervisor. It's the layer of structured expert dialogue that most doctoral programmes provide insufficiently. Visit researchdecode.com to learn more.
The Bottom Line
The skills that make a researcher genuinely competent — deep field knowledge, methodological literacy, intellectual argumentation, critical self-assessment, the capacity to communicate and defend original contributions — are not skills you acquire by completing tasks. They develop through sustained, iterative engagement with your research, with expert feedback, and with the practice of explaining and defending your thinking in real dialogue with other people who know what they're talking about.
The PhD viva tests all of them at once. But none of them need wait until the viva to be developed. The researchers who perform best in that examination room are the ones who have been building these skills throughout their doctoral journey — through their supervisory relationships, through structured preparation, through regular engagement with their field.
The list of skills matters. What matters more is how you develop them. Start now, not six months before your submission.
References
- Tan, W. C. (2023). Purpose-driven oral examination: insights from doctoral viva examiners. Discover Education, 2, 52. https://doi.org/10.1007/s44217-023-00083-6
- Lantsoght, E. O. L. (2022). Effectiveness of doctoral defense preparation methods. Education Sciences, 12(7), 473. https://doi.org/10.3390/educsci12070473
- McNeill, J., Benitez-Capistros, F., Dahdouh-Guebas, F., Deboelpaep, E., Hugé, J., Mukherjee, N., Van der Stocken, T., Van Puyvelde, K., & Koedam, N. (2024). Living the viva: The oral examination in practice. International Journal of Educational Methodology, 10(4), 629–643. https://doi.org/10.12973/ijem.10.4.629
- Cortazzi, M., & Jin, L. (2021). The doctoral viva: Questions for, with and to candidates (or supervisors). International Journal of Education & Literacy Studies, 9(4), 2–17. http://dx.doi.org/10.7575/aiac.ijels.v.9n.4p.2
- Watts, J. H. (2012). Preparing doctoral candidates for the viva: Issues for students and supervisors. In Preparing Doctoral Candidates for the Viva. The Open University, UK.
- Smith, P. (2014). The PhD viva: How to prepare for your oral examination. Palgrave Macmillan / Red Globe Press.
- Tinkler, P., & Jackson, C. (2000). Examining the doctorate: Institutional policy and the PhD examination process in Britain. Studies in Higher Education, 25(2), 167–180. https://doi.org/10.1080/030750700116291
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