This paper is an outpatient replication of Apsche, Bass, Jennings and Siv (2005) work which examined the effectiveness of Mode Deactivation Therapy (MDT) on adolescent conduct disordered males in an inpatient therapeutic setting. This research compared the effectiveness of MDT and Treatment as Usual (TAU) as treatments on adolescents with conduct and personality disorders in an outpatient setting. The results showed that MDT was superior in reducing overt aberrant behavior, including physical aggression and psychological distress as measured by the Achenbach Child Behavioral Checklist. (Contains 4 figures.)