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| Criterion |  UX Research Tree Testing |  UX Research Card Sorting |  Operations 5 Whys |
|---|---|---|---|
Purposedifferent | 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. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Medium | Low | Low |
Timedifferent | 1-2 Tage | 20-45 min | 15-30 min |
Participantsdifferent | Based on research question | Based on research question | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop |
Outputdifferent | Findability Metrics, Path Analysis, Revised IA | Content groups, Label set, IA hypotheses | Root cause notes, Countermeasures |
Tagsno overlap | Information architectureNavigationFindability | Information architectureNavigationStructure | Root causeIncidentLeanProblem solving |
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