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| Criterion |  Product Discovery Problem Interview |  UX Research Card Sorting |  UX Research First-click Testing |  UX Research Tree Testing |
|---|---|---|---|---|
Purposedifferent | 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. | When content only makes sense internally and users can't find the structure again, card sorting exposes their mental order. Terms, groups, and naming are then aligned with the target group's expectations. | When users immediately turn the wrong way on a screen or wireframe, first click testing checks initial orientation at high speed. The first click shows early whether expectation, labeling, and wayfinding fit together. | When a navigation exists but search paths still fail, tree testing checks findability without visual distraction. The method shows whether labels, levels, and paths really lead to the intended destination. |
Complexitydifferent | Medium | Low | Low | Medium |
Timedifferent | 30-60 min je Interview | 20-45 min | 1-2 Tage | 1-2 Tage |
Participantsdifferent | 5-12 Interviews | Based on research question | 10-30 | Based on research question |
Formatdifferent | Workshop + async | Workshop + async | Async | Async |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Content groups, Label set, IA hypotheses | Click Heatmap, Success Rate, Design Recommendations | Findability Metrics, Path Analysis, Revised IA |
Tagsno overlap | DiscoveryInterviewsValidation | Information architectureNavigationStructure | UXNavigationFindabilityValidation | Information architectureNavigationFindability |