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| Criterion |  UX Research Usability Testing |  Product Discovery Problem Interview |  Product Discovery Test Card |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | When a product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | When the picture of the problem still needs to become solid, it asks about real situations and consequences. It separates genuine suffering from mere interest in a solution. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 1-2 h je Session | 30-60 min je Interview | 20-35 min | 25-40 min |
Participantsdifferent | Based on research question | 5-12 Interviews | 1-5 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Usability Issues, Severity List, Recommendations | Problem Evidence, Risk Notes, Customer Segments | Test Card with a pre-set threshold | Learning Card with evidence and next action |
Tags1 shared | ValidationUXPrototype | DiscoveryInterviewsValidation | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryLearning |