The Computer-Assisted Hypnosis Scale: Standardization and Norming of a Computer-Administered Measure of Hypnotic Ability

In a counterbalanced, within-subjects, repeated measures design, 130 participants were administered both the Computer-Assisted Hypnosis Scale (CAHS; C. D. Grant, 1993 ) and the Stanford Hypnotic Susceptibility Scale, Form C (SHSS:C; A. M. Weitzenhoffer & E. R. Hilgard, 1962 ). For each hypnotic procedure, responsiveness was assessed along three dimensions: behavioral (CAHS, SHSS:C), subjective depth (Field Depth Inventory; P. B. Field, 1965 ), and relational involvement (Archaic Involvement Measure; M. R. Nash & D. Spinler, 1989 ). The CAHS was shown to be a psychometrically sound instrument for measuring hypnotic ability. The various dimensions of CAHS hypnotic responsiveness were highly positively related, and the CAHS compared favorably with the SHSS:C across the three dimensions assessed. Results are discussed in terms of the theory and practice of clinical assessment, noting directions for future research.