D. Corydon Hammond, Ph.D., ABPH, is past president and a fellow of the American Society of Clinical Hypnosis (ASCH), which honored him with a Presidential Award of Merit in 1989. He also received the ASCH Irving I. Secter Award in 1990 and the Thomas P. Wall Award for Excellence in Teaching of Clinical Hypnosis in 1994. He is Professor of Physical Medicine and Rehabilitation and Co-director of the Sex and Marital Therapy Clinic at the University of Utah School of Medicine. He has written six books, including the Handbook of Hypnotic Suggestions and Metaphors. He coordinated a national task force on hypnosis and memory and is the primary author of Clinical Hypnosis and Memory: Guidelines for Clinicians and for Forensic Hypnosis and of ASCH's Standards of Training in Clinical Hypnosis.
Highly respected social work educators, Dean H. Hepworth and Jo Ann Larsen originally defined how direct practice should be taught.