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| Criterion |  UX Research User Interviews |  UX Research Tree Testing |  UX Research Card Sorting |
|---|---|---|---|
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 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. | 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. |
Complexitydifferent | Low | Medium | Low |
Timedifferent | 30–60 min per interview | 1-2 Tage | 20-45 min |
Participantsdifferent | 1 participant per interview | Based on research question | Based on research question |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Findability Metrics, Path Analysis, Revised IA | Content groups, Label set, IA hypotheses |
Tagsno overlap | QualitativeResearchCustomerDiscovery | Information architectureNavigationFindability | Information architectureNavigationStructure |
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