The impact of mental health diagnoses on perceptions of risk of criminality.

Background: Previous research has examined the relation between mental illness (MI) and perceptions of dangerousness, but less research has focused on its relation to perceived risk of criminality. Individuals with MI are perceived to be more dangerous than those without, and individuals with schizophrenia or substance abuse diagnoses are viewed as being more dangerous. Research also supports that race of individuals with MI plays an important role in the conceptualization and experience of stigma.

Aims: The current study investigated the relation between MI, perceived criminality and race of diagnosed individuals.

Method: Two hundred ninety participants were randomly assigned to read one of the four vignettes and answer a series of questions. The first three vignettes depicted someone with MI (schizophrenia, depression or alcohol dependency), while the fourth vignette served as a control. Participants were asked to indicate likelihood of committing a future crime, severity of the future crime and the person's potential for rehabilitation. Levels of sympathy and trust, as well as perceived race of the person, were also measured.

Results: Presence of MI was a significant predictor where MI elicited higher levels of perceived risk of criminality. The remaining predictor variables (type of MI, familiarity with MI and criminality and perceived race) were not significant predictors. Exploratory analyses revealed the schizophrenia and alcohol dependency conditions elicited higher levels of perceived severity of future crimes. Perceived MI severity and likelihood of rehabilitation were all significantly correlated with perceived risk of criminality.

Conclusion: Presence of MI appears to be the most important in influencing participant attitudes about perceived risk of criminality, though type of MI may influence beliefs about severity of future crimes. The impact of race could not be examined but should be examined in future studies.