Peter J. Norton, PhD, is Professor of Clinical Psychology and Director of the FEAR Clinic at Monash University in Melbourne, Australia. A Fellow of the American Psychological Association (APA), Dr. Norton is an internationally recognized researcher and developer of transdiagnostic cognitive-behavioral therapy for emotional disorders. He has authored numerous research studies; has delivered many presentations and workshops for the scientific community, therapists, and the general public; and sits on the editorial boards of two scientific journals. He is a recipient of the Theodore Blau Early Career Award for Outstanding Contribution to Professional Clinical Psychology from the Society of Clinical Psychology (Division 12 of the APA), among other honors.

Martin M. Antony, PhD, ABPP, is Professor of Psychology at Ryerson University in Toronto, Ontario, Canada. He was founding director of the Anxiety Treatment and Research Clinic and the Psychology Residency Program at St. Joseph’s Healthcare Hamilton. The recipient of career awards from the Society of Clinical Psychology (Division 12 of the American Psychological Association), the Canadian Psychological Association (CPA), and the Anxiety and Depression Association of America, Dr. Antony is a Fellow of the Royal Society of Canada and has served as president of the CPA and the Association for Behavioral and Cognitive Therapies. He has published over 30 books and 275 scientific articles and book chapters on cognitive-behavioral therapy, psychological assessment, anxiety disorders, obsessive–compulsive disorder, and perfectionism.