He was founding president of the American Society for Clinical Hypnosis and a fellow of the American Psychiatric Association, the American Psychological Association, and the American Psychopathological Association.
Был членом Американской психиатрической ассоциации (American Psychiatric Association), Американской ассоциации психологии (American Psychological Association), Американской ассоциации психопатологии (American Psychopathological Association).