An Automated Conversational Agent Self-Help Program: Randomized Controlled Trial

Abstract

Background: Health promotion and growth-based interventions can effectively improve individual well-being; however, significant gaps in access and utilization still exist. Objective: This study aims to develop and test the effectiveness and implementation of a new, widely targeted conversational agent prevention program (Zenny) designed to enhance well-being. Methods: A total of 1345 individuals in the United States were recruited online and randomly assigned to either (1) a self-help program intervention delivered via an automated conversational agent on WhatsApp or (2) an active control group that had access to evidence-based wellness resources available online. The primary outcomes were well-being (measured using the 5-item World Health Organization Well-being Scale), psychosocial flourishing (assessed with the Flourishing Scale), and positive psychological health (evaluated with the Mental Health Continuum-Short Form). Outcome measures were collected at baseline and again 1 month postassessment. All analyses were conducted using an intention-to-treat approach. Results: Both groups showed significant improvements in well-being (self-help program intervention group effect size: Cohen d=0.26, P