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| Criterion |  UX Research Diary Study |  Product Discovery Riskiest Assumption Test |  Product Discovery Experiment Canvas |  Product Discovery Test Card |
|---|---|---|---|---|
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 an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. | When experiments become unreadable after the fact, it arranges hypothesis, signal, and learning goal on a single canvas. It separates problem, assumption, solution, and evidence. The result is captured as a Completed Experiment Canvas and a Success Metric. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 1-4 Wochen | 1-2 Wochen pro Iteration | 30-60 min | 20-35 min |
Participantsdifferent | 5-20 | 2-6 | 1-5 | 1-5 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Prioritized Assumption List, Test Plan, Results Report | Completed Experiment Canvas, Success Metric | Test Card with a pre-set threshold |
Tagsno overlap | UX researchTrackingBehavior | ExperimentsValidationDiscoveryAssumptions | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryHypothesis |