a new cognitive-behavioral approach to obsessions and compulsions was born. In many respects, my own professional development has taken a path similar to that seen in cognitive-behavioral therapy (CBT) for obsessional states. My roots are in the behavioral tradition, dating back to the early 1980s when I was a graduate student at the Institute of Psychiatry in London, England. My interest in OCD and unwanted intrusive thoughts was sparked by the stimulating discussions and innovative research of