The study will include children with co-occurring psychiatric conditions because of high comorbidity rates in ADHD. Comorbidity is present in as many as two-thirds of children with ADHD, including up to 50% for other disruptive disorders, 15%-20% for mood disorders, 20% to 25% for anxiety disorders, and 15-20% for learning disorders (Dulcan et al., 1997). Thus, with inclusion of children with comorbidity, the findings will have greater generalizability. Additionally, the comorbid children and adolescents are often too complex for primary care treatment and need child psychiatric services. The study will include: