Jayne L. Rygh, PhD, is a senior psychologist at the Cognitive Therapy Center of New York, where she is both a psychotherapist and a supervisor. She treats clients suffering primarily from anxiety, depressive, and personality disorders, using cognitive-behavioral and schema therapies. In addition, Dr. Rygh has served as an independent evaluator and research psychotherapist in numerous National Institute of Mental Health grants on the treatment of anxiety disorders. William C. Sanderson, PhD, is Professor of Psychology at Hofstra University. He has served on numerous national committees, including the American Psychiatric Association's DSM-IV Anxiety Disorders Workgroup, and was recently Chair of the Committee on Science and Practice (a task force aimed at identifying and promoting the practice of empirically supported psychological interventions) of the American Psychological Association's Division of Clinical Psychology. Dr. Sanderson has published six books and more than 85 articles and chapters, primarily in the areas of anxiety, depression, personality disorders, and cognitive-behavioral therapy.