Development, Reliability, and Validity of the Children's Aggression Scale-Parent Version

Abstract

To provide preliminary psychometric data on the Children's Aggression Scale-Parent Version (CAS-P), which assesses severity, frequency, pervasiveness, and diversity of aggressive, as distinct from nonaggressive, disruptive behaviors. The scale has 33 items representing five domains: Verbal Aggression, Aggression Against Objects and Animals, Provoked Physical Aggression, Unprovoked Physical Aggression, and Use of Weapons. The CAS-P was completed for 73 clinically referred children. Validity was evaluated dimensionally by examining the relationship of CAS-P scores to other parent and teacher rating scales, and categorically by comparing scores of children with attention-deficit hyperactivity disorder (ADHD) alone, oppositional defiant disorder, and conduct disorder. The scale as a whole had excellent internal consistency (alpha = .93). Children with conduct disorder were rated significantly higher than those with oppositional defiant disorder, who were rated significantly higher than those with ADHD alone. The CAS-P did not distinguish clinical control children from those with ADHD only. Correlations with other rating scales provide further support for the validity of the CAS-P. The CAS-P assesses distinct components of aggressive behavior and may fill a gap in that it distinguishes among various types and severity of aggressive behaviors, and the settings in which they take place.