Why Saturation Is a Viva Flash Point
Sample size in qualitative research is one of the topics most frequently challenged in Malaysian postgraduate vivas. When a candidate says “I interviewed sixteen participants”, the natural follow-up question is “why sixteen?” If the answer is “because that was how many I could access” or “because similar studies used that number”, the examiner knows the sampling decision was not principled. If the answer is “because saturation was reached after the fourteenth interview, confirmed by two additional interviews”, the examiner knows the sampling was theoretically grounded. Being prepared to discuss saturation specifically and concretely in your Malaysian viva is essential for any qualitative researcher.
The Specific Questions to Prepare For
Several saturation questions appear regularly in Malaysian qualitative vivas. “How did you know you had reached saturation?” is the most common and requires a process account: what did you review after each interview, what pattern indicated saturation, and what did you do to confirm it. “When did saturation occur?” requires a specific answer — a participant number or interview number — not “sometime during data collection.”
“Did any participant provide entirely new information after you believed saturation had been reached?” is a more sophisticated probe that tests whether you monitored saturation throughout rather than declaring it at a convenient point and stopping. If the answer is yes, you need to explain how you handled the new information and whether it changed your themes. If the answer is genuinely no — if your confirmation interviews were truly confirmatory — say so clearly and explain what this indicated about the adequacy of your sample.
Being Honest About Saturation Limitations
Not every qualitative study achieves unambiguous saturation. Sometimes access constraints mean data collection ends before saturation is fully established. Sometimes the study design — multiple case studies across very different sites — makes cross-site saturation difficult to achieve or define clearly. Being honest about these limitations is more credible than claiming perfect saturation when the study’s circumstances make this implausible.
“Saturation was not fully established within my sample — the three sites were sufficiently different that data from one site continued to generate codes not present in the other two until the final interviews. I acknowledge this as a limitation, and the findings are presented as exploratory rather than as saturated themes that can be confidently transferred to other contexts.” This response is honest, analytically aware, and appropriately calibrated — exactly the kind of methodological transparency that earns examiner respect in a Malaysian viva discussion of qualitative sampling.
