Investigating the Momentary Effects of Positive Psychology Interventions in Addressing Mental Health: A Micro-Randomised Trial Study

This study examines the proximal effect of PPIs on the positive and negative affect by applying micro-randomised trials (MRTs). This study further investigates mental health changes after participating in PPIs for 15 days. The secondary objective is to evaluate the acceptance and feasibility of the research method of MRTs in assessing PPIs' proximal effects.