Psychometric properties of a modified version of the Weiss Functional Impairment Rating Scale-Parent Report (WFIRS-P) in a clinical sample of children with aggressive behavior

To evaluate the psychometric properties of a German modification of the Weiss Functional Impairment Rating Scale—Parent Report for children with aggressive and oppositional behavior problems (WFIRS-P for ODD/CD). Data were collected from a clinical sample of children (6–12 years; 96% boys) with oppositional defiant disorder (ODD) and conduct disorder (CD) (N = 219). The WFIRS-P conceptual framework was evaluated using confirmatory factor...