Allan M. Leventhal is Professor Emeritus of Psychology at American University, where he also served as Director of the Counseling Center. He is a Diplomate in Clinical Psychology with the American Board of Professional Psychology, a Fellow of the American Psychological Association, and past president of the Maryland Psychological Association, as well as past chairman of the Maryland State Board of Examiners of Psychologists. Until his retirement last year, he was engaged in the out-patient practice of psychology for more than twenty-five years. He is the recipient of an Outstanding Psychologist Award from the Maryland Psychological Association.
Christopher R. Martell is Clinical Associate Professor at the University of Washington, and a psychologist in private practice in Seattle. He is a Diplomate in Clinical Psychology and Behaviorial Psychology with the American Board of Professional Psychology, and a Fellow of the American Psychological Association. He is past president of the Washington State Psychological Association, a founding fellow of the Academy of Cognitive Therapy, and recipient of the 2004 Washington State Psychological Association's Distinguished Psychologist award.