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Diary Study Design

Structured brief

Capture behaviour over time.

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Design a diary study. Research question: [QUESTION]. Participants and duration: [PARTICIPANTS_DURATION]. Tools they could use: [TOOLS].

Define entry types and prompts, frequency, reminders, onboarding session, check-ins, incentives, and ethics (consent, privacy of what participants record). Provide daily prompts for the first week, a kickoff script, and an analysis plan: coding entries, finding patterns over time, and a follow-up interview guide. Include pilot testing, ways to keep participants engaged, and handling dropouts. Mark data protection requirements [VERIFY] for [JURISDICTION].

Add a sample first-day message to participants of about 100 words, a plan for checking entries early to correct misunderstandings, and a template for the follow-up interview that uses specific entries as prompts. Include guidance on keeping the burden low, such as limiting each entry to five minutes, and on handling missed entries.

Add a worked schedule for a two-week diary study of how people manage household bills, with invented details: day-one onboarding call, one entry prompt per day of two types (what happened and a photo of the moment), a mid-study check-in on day seven, an end-of-study interview on day fifteen. Write the first seven daily prompts in full, each under 25 words. Label it an illustration. Add an analysis plan that codes entries into themes with a simple codebook of ten codes, a method for building a timeline per participant, and a table of findings that shows how many participants showed each pattern. Include an incentive plan that rewards completion in proportion and does not depend on the content of entries, and a data protection checklist for photos. Finish with a plan for the last day of the study: a thank-you message, confirmation of the incentive, a reminder of how data will be used and deleted, and an offer to share a summary.

Also add a list of what to do if participants say that nothing happened that day, so that empty entries are still useful, and a plan for sharing preliminary findings with participants if appropriate.

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