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| Criterion |  UX Research Diary Study |  Product Discovery Wizard of Oz Test |  Product Discovery Solution Interview |  UX Research Usability Testing |
|---|---|---|---|---|
Purposedifferent | When experiences build up over days or weeks and a single session cannot capture them, Diary Study records the course of everyday life. Recurring triggers, moods, and habits become visible this way, beyond the sharpness of memory. | When a new experience would still be too expensive to automate for real, it simulates the outcome behind the scenes. It checks user reaction and value before the technology disappears. | When a solution idea is already on the table, it checks how it is understood and evaluated. It looks for resonance, objections, and missing fit early in the conversation. | 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. |
Complexitydifferent | Medium | High | Medium | Medium |
Timedifferent | 1-4 Wochen | 2-10 Tage | 30-60 min je Interview | 1-2 h je Session |
Participantsdifferent | 5-20 | 5-20 Nutzer | 5-10 Interviews | Based on research question |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Prototype Learnings, Manual Effort Notes, Risk List | Solution Feedback, Objection List, Validation Notes | Usability Issues, Severity List, Recommendations |
Tagsno overlap | UX researchTrackingBehavior | PrototypeValidationMVP | ValidationInterviewsPrototype | ValidationUXPrototype |