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Optimizing Chatbot Reminder Timing in a Chatbot Cessation Service: A Micro-Randomized Trial
Sponsor: The University of Hong Kong
Summary
The goal of this study is to learn whether the timing of weekly chatbot reminders affects user engagement with the chatbot cessation service. Participants enrolled in the routine chatbot cessation service will be included in a micro-randomized trial. The delivery timing of weekly reminders will be randomly assigned across different day types and times of day during the 12-week chatbot cessation service period. The study will use routine chatbot system records to evaluate engagement after reminder delivery, including whether participants respond to the chatbot and how quickly they re-engage with the service.
Official title: A Micro-Randomized Trial to Optimize the Timing of Weekly Chatbot Reminders for User Engagement in a Chatbot Cessation Service
Key Details
Gender
All
Age Range
Any - Any
Study Type
INTERVENTIONAL
Enrollment
350
Start Date
2026-09-28
Completion Date
2027-12-31
Last Updated
2026-10-01
Healthy Volunteers
No
Conditions
Interventions
Chatbot Cessation Service With Randomized Reminder Timing
The chatbot cessation service provides digital smoking cessation support through a chatbot platform. Participants receive routine chatbot-based cessation support, including scheduled weekly AI-generated reminders during the 12-week service period. Excluding the initial welcoming message, the timing of the remaining 11 weekly reminders will be repeatedly randomized at weekly decision points across predefined day-type and time-of-day conditions. The randomized component is limited to reminder delivery timing. All participants receive the same chatbot content and support.
Locations (1)
School of Nursing, The University of Hong Kong
Hong Kong, Hong Kong