Stefan G. Hofmann, Ph.D., is an Associate Professor of Psychology at the Department of Psychology at Boston University and the director of the social anxiety program at the Center for Anxiety and Related Disorders. Hofmann is co-president of the Anxiety Disorders Special Interest Group of the Association for the Advancement of Behavior Therapy (AABT).

Michael W. Otto, Ph.D., is a Professor in the Clinical Psychology Program at Boston University. He sits on the scientific advisory board of the Anxiety Disorders Association of American (ADAA), and is President-Elect (2004-2005) of the Association for the Advancement of Behavior Therapy. Dr. Otto is a fellow of the American Psychological Association and he serves as a section editor for Cognitive and Behavioral Practice, and on the editorial boards of Anxiety, Behavior Research and Therapy, Clinical Psychology: Science and Practice, Journal of Anxiety Disorders, Journal Watch in Psychiatry, and Psychotherapy and Psychosomatics.