The vast majority of children with obsessive compulsive disorder (OCD) are given serotonin reuptake inhibitor (SRI) drugs as initial treatment. However, recommended doses of these medications leave many children with clinically significant residual symptoms. Health care experts typically recommend augmenting SRI treatment with cognitive behavioral therapy (CBT), yet this recommendation is seldom followed. This study will contrast two CBT augmentation strategies to continued medication management alone: CBT administered by a psychologist and instructional CBT (I-CBT)administered by a psychiatrist in the context of ongoing medication management.