The empirically derived Violence and Aggression Risk Index from the Personality Assessment Inventory: Development,...

The current study developed a new index of violence risk from scales within the Personality Assessment Inventory (PAI). Clinical patients from inpatient and outpatient settings completed the PAI along with reports of violence history and arrest record. A forward-selection hierarchical logistic regression was employed (N = 388) to identify the PAI scales (AGG-P, AGG-A, NON, PAR-H, and ANT-A) that could effectively distinguish patients with and without a history of violence. These indicators were then aggregated into a single index, labeled the Violence and Aggression Risk Index (VARI). The VARI modestly incremented other PAI subscales and indices in an independent clinical sample (N = 387). The authors discuss how the VARI can be incorporated with the other PAI scales to assess violence risk.