Diary Study Design for Longitudinal User Behavior Research
Plan and execute a diary study that captures user behaviors, emotions, and contexts over days or weeks to reveal patterns that single-session research misses.
Design a diary study methodology that captures authentic user experiences over time, revealing habitual behaviors, context-dependent needs, and longitudinal satisfaction trends.
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Prompt objective
Design a diary study methodology that captures authentic user experiences over time, revealing habitual behaviors, context-dependent needs, and longitudinal satisfaction trends.
Real use case
A health app wants to understand how users' exercise habits change over 4 weeks — do they start strong and fade? What triggers re-engagement? A single usability test can't capture this temporal dimension.
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Prompt
Design a diary study for [PRODUCT NAME] to understand [RESEARCH QUESTION] over a [NUMBER]-week period with [NUMBER] participants. **Study Design:** - Duration: [NUMBER] days/weeks - Participants: [NUMBER] (recruitment criteria) - Method: [Mobile app / WhatsApp / Email / Paper journal] - Entry frequency: [X] times per day or event-triggered **Daily Entry Template:** For each diary entry, participants report: 1) Activity: What did you do related to [TOPIC]? 2) Context: Where were you? What device? What time? 3) Emotion: How did you feel? (emoji scale + brief description) 4) Friction: What was difficult or frustrating? 5) Motivation: What drove you to do this? 6) Photo/video: Capture the moment (if applicable) **Weekly Check-in:** - 15-minute video call or phone interview - Review diary entries together - Probe on patterns and anomalies - Clarify ambiguous entries **Participant Engagement:** - Onboarding session: train participants on how to keep diary - Reminder system: push notifications or scheduled messages - Gamification: streak counter, completion badge - Compensation: base + bonus for complete entries - Mid-study check-in to maintain motivation **Analysis Framework:** - Timeline visualization: plot entries chronologically - Pattern identification: recurring behaviors, emotions, contexts - Journey map from diary data - Critical incident analysis: peak positive and negative moments - Participant quotes organized by theme **Deliverables:** - Participant diary excerpts (anonymized) - Behavioral pattern report - Temporal journey map - Design implications and recommendations - Video highlights reel (if video diaries) Include diary entry template, participant instructions, and analysis spreadsheet.
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