Understand reasons and experience
In-depth interviews examine situations, needs, alternatives and product use. They explain decision mechanisms rather than measure market prevalence.
Start with the decision and the kind of evidence you need.
In-depth interviews examine situations, needs, alternatives and product use. They explain decision mechanisms rather than measure market prevalence.
Focus groups reveal reactions, language and arguments. Group dynamics are part of the method; responses are not independent survey observations or a sales forecast.
Surveys estimate answer distributions and compare groups within their design. Wider generalisation requires appropriate sampling and coverage.
Observation, shop-alongs and diaries examine actions in context. Stated habits and actual actions may differ, so compare sources where useful.
Interviews can inform hypotheses and questionnaire wording; a survey can examine distributions. This sequence is useful in some projects, not a universal requirement.
More responses do not fix the wrong question or missing audiences. Check methodological fit and participant access first.