The Effects of the PsyPills App on Emotion Regulation and Risk Behaviors in Emerging Adults: A Randomized Clinical Trial

The research design will be a 2-arm controlled clinical trial, with 3 waves of data collection. This single-blind, randomized controlled study will evaluate the efficacy of the PsyPills app in enhancing emotion regulation and reducing engagement in risky behaviors among emerging adults aged 18-29. Participants will complete demographic questions and the Suicidal Behaviors Questionnaire-Revised (SBQ-R) for safety screening. Participants will additionally complete baseline measurements for primary and secondary outcomes. Next, eligible participants will be enrolled and randomly assigned (1:1) to one of two conditions: PsyPills app (experimental group) or MoodWheel app (active control group). Among the constructs evaluated are emotion regulation difficulties; cognitive emotion regulation strategies and risky behaviors (substance use, risky sexual behavior, self-harm, aggression, disordered eating). Both intervention groups will use their assigned mobile application for a two-week period, with a minimum usage frequency of 3 sessions per week. The PsyPills app allows users to monitor and label emotions and delivers short, adaptive cognitive-behavioral interventions ("psychological pills") based on REBT principles and the JITAI framework, aiming to improve emotion regulation in real time by using rational thinking strategies to change the intensity of dysfunctional emotionality. The MoodWheel app serves as an active control, simply allowing users to monitor and label emotions without providing cognitive restructuring or feedback.