Comparing brief video interventions to reduce public and self-stigma: Randomized control trial.

Aim: Stigma is a major mental healthcare barrier. This study compares the efficacy of two types of brief video interventions, targeting public and self-stigma, in reducing public stigma towards people living with psychosis. We hypothesized both interventions would similarly reduce public stigma and outperform the control group. As a secondary analysis, we explored the effect of familiarity with a person living with serious mental illness (SMI).

Methods: Participants (N = 1215) aged 18-35 recruited through crowdsourcing were assessed pre- and post-intervention and at 30-day follow-up regarding five public stigma domains: social distance, stereotyping, separateness, social restriction and perceived recovery. Both videos present individual narratives using different approaches: the self-stigma video was created through focus groups, while the public stigma video portrays a single person's journey.

Results: A 3 × 3 analysis of variance (ANOVA) revealed a significant group-by-time interaction across all five stigma-related domains (p's < .001). Effect sizes (Cohen's d) ranged from 0.29 to 0.52 (baseline to post-intervention), and 0.18 to 0.45 (baseline to 30-day follow-up). The two video interventions did not significantly differ. Linear mixed modelling showed a significant difference between participants familiar and unfamiliar with people living with SMI for the public stigma video, with greater stigma reductions for unfamiliar participants.

Conclusions: This study corroborates previous findings on the positive influence of social contact-based interventions on youth mental health perceptions. Results provide insights into the relationship between public and self-stigma and the impact that familiarity with SMI may have on the efficacy of stigma reduction efforts further validation in diverse groups is needed.