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| Criterion |  UX Research User Interviews |  Growth A/B Testing |  Product Discovery Riskiest Assumption Test |
|---|---|---|---|
Purposedifferent | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. | 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. |
Complexitydifferent | Low | High | Medium |
Timedifferent | 30–60 min per interview | 1-4 Wochen | 1-2 Wochen pro Iteration |
Participantsdifferent | 1 participant per interview | 1-6 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Experiment results, Decision log, Learning summary | Prioritized Assumption List, Test Plan, Results Report |
Tagsno overlap | QualitativeResearchCustomerDiscovery | ExperimentsGrowthAnalyticsValidation | ExperimentsValidationDiscoveryAssumptions |
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