What this Trial Is About

Low self-efficacy is a transdiagnostic risk factor for several mental disorders. Self-efficacy refers to one's belief that one is capable of performing a behavior necessary to successfully complete a task or achieve a goal. Consistent with theoretical models and empirical findings, individuals with low self-efficacy are more likely to perceive challenges as uncontrollable and threatening and thus are at increased risk for developing mental disorders during sensitive periods such as young adulthood. Self-efficacy interventions have been shown to be effective in promoting health behavior change, quality of life, and treatment adherence in patients with serious illnesses, as well as motivation and performance in students and employees. However, whether targeted self-efficacy training can prospectively prevent the onset of full-threshold anxiety, affective, and substance use disorders in young adults at increased risk for psychopathology remains an open question. The aim of this randomized controlled trial is to test whether a brief cognitive-behavioral intervention in young adults with low self-efficacy can increase general self-efficacy (primary outcome of intervention effectiveness) and thus prevent the onset of DSM-5 mental disorders in the subsequent year (primary outcome of prevention effectiveness). In addition, we examine whether improvements in domain-specific self-efficacy lead to subsequent improvements in general self-efficacy and thus to lower psychopathological symptoms (spillover effects). Young adults (18-30 years) with low self-efficacy but no mental disorder will be included (N=378). The study will include screening, entry, baseline, post, and 12-month follow-up assessments plus additional course assessments in both groups. After the baseline assessment, participants will be randomized to an intervention or control group. The intervention group will receive group-based self-efficacy training (6 sessions of 75-90 minutes each). The control group will also meet in groups (6 sessions) but will only talk about psychological research findings unrelated to self-efficacy or cognitive-behavioral interventions without receiving any training. DSM-5 mental disorders will be assessed at study entry and follow-up with a structured diagnostic interview. Other outcomes will be assessed with established scales and ecological momentary assessments (EMA) at baseline, post and follow-up. Clinical outcomes include psychopathological symptoms (dimensional scores for anxiety, depression, anger, and somatic symptoms, as well as sleep disturbance) and mental disorders (DSM-5 categorical diagnoses of anxiety, affective, and substance use disorders). Intervention effectiveness will be tested using logistic/linear regression and multilevel analyses. Spillover effects between improvements in domain-specific/general self-efficacy and psychopathological symptoms over the course of the study will be examined using cross-lagged panel models.

Prevention of Mental Disorders Through Self-efficacy Interventions