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| Criterion |  UX Research Diary Study |  Growth Growth Experiment |  Growth North Star Metric |
|---|---|---|---|
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 growth ideas surface quickly, the temptation to build immediately instead of learning is high. A Growth Experiment frames an assumption so target group, lever, and measurement are clear before the first deployment. | When product teams track many metrics, the view of the actual customer outcome easily gets lost. A North Star Metric bundles growth, usage, and value contribution into one signal that makes the system's direction visible. |
Complexitysame | Medium | Medium | Medium |
Timedifferent | 1-4 Wochen | 1-2 Wochen | 1-2 h |
Participantsdifferent | 5-20 | 1-6 | 3-8 |
Formatdifferent | Async | Workshop + async | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Experiment card, Result summary, Next bet | North Star metric, Input metric tree, Measurement cadence |
Tagsno overlap | UX researchTrackingBehavior | MarketingGrowthExperimentsLearning | GrowthMetricsAlignmentRetention |
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