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| Criterion | ![]() UX Research User Interviews | ![]() UX Research Card Sorting | ![]() Product Discovery Learning Card | ![]() Product Discovery Fake Door 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 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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | When demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small. |
Complexitydifferent | Low | Low | Low | Medium |
Timedifferent | 30–60 min per interview | 20-45 min | 25-40 min | 1-5 Tage |
Participantsdifferent | 1 participant per interview | Based on research question | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Content groups, Label set, IA hypotheses | Learning Card with evidence and next action | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | QualitativeResearchCustomerDiscovery | Information architectureNavigationStructure | ExperimentsValidationDiscoveryLearning | ValidationExperimentsDemandDiscovery |



