Evaluating the Effects of a Computerized Training Program Coupled With Cognitive Behavioral Therapy (CBT) for OCD.

Inclusion Criteria: * Principal diagnosis of OCD (assessed by SCID). * Clinically significant OCD symptoms (Y-BOCS score of at least 14). * Allowed to be on medications if they have been on a stable dose for at least 12 weeks prior to the study and will remain on a stable dose during this study. * Have access to a computer or laptop. Exclusion Criteria: * Individuals with the following disorders will excluded: bipolar, psychosis, current major depressive disorder (assessed by SCID). * Patients with head injury and loss of consciousness of more than five minutes or a neurological condition affecting the central nervous system. * Patients taking a psychiatric medication will be asked to maintain a stable dose for 6 weeks prior to study entry. * Patients with a history of more than 8 hours of therapist-assisted ERP for OCD in the past 6 months, * Vision or hearing loss (although individuals with vision corrected by glasses or contacts will not be excluded). * Active suicidality warranting immediate clinical care.