Personality types based on Gray’s model predict physical violence in males
Principal aim of this study was to determine whether personality types contribute significantly to prediction of violent behavior in males. The study was conducted on a sample of 716 male participants, aged 18–76, comprising 107 prison inmates and 609 from non-prison population. RSQ questionnaire was applied, measuring 5 dimensions of revised Gray’s model. Three forms of physical violence (towards family members, towards close people, and towards unknown people) were assessed by PRONA questionnaire. Cluster analysis revealed three personality types based on RSQ scores, named Approaching, Avoidant and Controlled. Clusters were replicable across prison and non-prison populations. Hierarchical binary logistic regressions revealed that personality types contribute significantly to prediction of physical violence towards close people in overall sample (Approaching type had a significant contribution), as well as in prison and non-prison sub-samples. There was no significant contribution of personality types to prediction of other forms of violent behavior.