The goal of this project is to improve access to effective treatments for obsessive compulsive disorder (OCD) through the use of web-based cognitive behavioral therapy (CBT) treatment. There intervention involves both a computer program (BT Steps) and human interaction via telephone. The investigators will test the efficacy and feasibility of computer therapy alone (n=35), computer plus a non-therapist coach (n=35), and computer plus a CBT therapist coach (n=35