Abstract
Abstract The cluster of behavior problems known as the disruptive behavior disorders, including oppositional defiant disorder and conduct disorder, represent the most common reason for referral among all childhood mental health problems. Without early preventive and intervention services, these behaviors may escalate over time, becoming more frequent, severe, and maladaptive in nature, resulting in significant and long-lasting negative consequences that affect individuals, families, schools, communities, and society in general. Historically, disruptive behavior disorders were perceived to be some of the most difficult disorders with which to intervene and ameliorate symptoms. Fortunately, evidence-based preventive and early intervention programs delivered across various settings have been developed that improve outcomes for these children and adolescents and their families.