Advancing Understanding of Just-in-Time States for Supporting Physical Activity (Project JustWalk JITAI): Protocol for a System ID Study of Just-in-Time Adaptive Interventions

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Park, Junghwan | Kim, Meelim | El Mistiri, Mohamed | Kha, Rachael | Banerjee, Sarasij | Gotzian, Lisa | Chevance, Guillaume | Rivera, Daniel | Klasnja, Predrag | Hekler, Eric

Edité par CCSD ; JMIR publications -

International audience. Just-in-time adaptive interventions (JITAIs) are designed to provide support when individuals are receptive and can respond beneficially to the prompt. The notion of a just-in-time (JIT) state is critical for JITAIs. To date, JIT states have been formulated either in a largely data-driven way or based on theory alone. There is a need for an approach that enables rigorous theory testing and optimization of the JIT state concept. The purpose of this system ID experiment was to investigate JIT states empirically and enable the empirical optimization of a JITAI intended to increase physical activity (steps/d).

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