Obsessive-compulsive disorder is now recognized to be a serious and chronic illness affecting more than 2% of the population. While the last decade of the twentieth century witnessed many advances on both the pharmacological and the behavioral fronts, fewer than 50% of cases benefitted significantly from treatments available at the time. In this volume, originally published in 2000, leading authorities offer a comprehensive, cutting-edge overview of etiology, diagnosis, assessment, and the latest cognitive-behavioral, biological, and combined approaches to intervention. A special focus is...