 Oppositional defiant disorder ODD and conduct disorder CD are two common childhood psychiatric disorders. Children with ODD frequently have temper tantrums, argue excessively with adults, deliberately attempt to annoy or upset people, and blame others for their mistakes or behavior. Children with CD may exhibit aggression toward people and animals, destruction of property, deceitfulness, and rule breaking. The symptoms of these disorders can negatively affect childrens social, family, and academic lives. Research has shown that early, comprehensive treatment leads to better treatment outcomes. Both disorders are commonly treated using parent training techniques. A multiple family group therapy setting may prove to be more engaging and beneficial than standard care for both parents and children. This study will examine the effectiveness of a multiple family group MFG mental health service delivery strategy in improving mental health service use and treatment outcome for urban, low income children of color with ODD or CD. 