Neurofeedback for Obsessive-Compulsive Disorder (OCD)

Inclusion Criteria: * Primary Diagnosis of Current OCD, based on Diagnostic and Statistical Manual (DSM-IV) criteria, a Y-BOCS (Yale-Brown Obsessive-Compulsive Scale) score \>=16 * Principle OCD symptoms- Primary symptoms must be either Cleaning/Contamination or Checking; other symptoms okay * Unmedicated (or medications stable for 8 weeks). * Research group must be able to identify a target region in the orbitofrontal cortex that is related to symptoms Exclusion Criteria: * Active Psychosis; Pervasive Developmental Disorder ; epilepsy or other major neurological disorder * History of major head trauma or psychosurgery * Active Substance Abuse within 6 months * Seizure disorder or other significant neurological disorder * Active Suicidality * Pregnancy * severe claustrophobia, ferromagnetic metal in the body, a pacemaker or defibrillator, or any other condition that would make MRI scanning unsafe or inappropriate * any psychotropic medication other than a selective serotonin reuptake inhibitor (SSRI) antidepressant, anafranil, or a low-dose hypnotic or anxiolytic taken on an as-needed basis * active cognitive/behavioral therapy initiated within the last 3 months (continuation of established maintenance therapy that has been going on for longer than 3 months will not be grounds for exclusion)