How continuum beliefs can reduce stigma of schizophrenia: The role of perceived similarities.

Growing evidence has shown continuum beliefs as a promising tool to reduce psychiatric stigma in the general population, but data still lack regarding mechanisms underlying this effect. This study aims at testing the hypothesis that continuum beliefs affect public stigma and self-stigma by increasing perceived similarities between oneself and people with schizophrenia. Perceiving such similarities may reduce public stigma and increase self-stigma in the general population. The current study was preregistered on OSF. Data were collected via an on-line survey (N = 565). Participants were randomly assigned to one of the three experimental conditions. Continuum beliefs were induced with short videos supporting either a continuum viewpoint of schizophrenia, a categorial viewpoint of schizophrenia, or a neutral video. A scale of Perceived similarities between oneself and people with schizophrenia was administered. Public stigma was measured with an Essentialism scale and Self-stigma with a scale of self-stereotype association. Mediation analyses showed that the effects of categorial and continuum beliefs on essentialism and self-stereotype association were mediated by perceived similarities. Our results suggest that continuum beliefs about schizophrenia act as a recategorization mechanism, by enhancing perceived similarities with the stereotyped group.