On the basis of the transtheoretical model of change, we hypothesized that hypnosis would facilitate significantly greater movement through the stages of change toward smoking cessation in contrast to psychoeducation. Thirty participants were pretested for hypnotizability using the Elkins Hypnotizability Scale (EHS). Participants’ readiness for change was assessed using the University of Rhode Island Change Assessment scale (URICA). The EHS relaxation induction was used to induce hypnosis. Hypnotic suggestions addressed motivation and ambivalence. The URICA was administered following the intervention and at a 10-day follow-up. Two-factor split-plot ANOVAs showed significant changes within groups on the contemplation subscale (p = .002), action subscale (p = .00007), and the number of cigarettes smoked per day (p = .003).
Measuring hypnotizability is an integral part of hypnosis research and also relevant for predicting the effectiveness of hypnosis-based therapies. The Elkins Hypnotizability Scale (EHS) was designed to meet the needs of modern hypnosis research and clinical practice. Reliability, validity, and normative data were explored by subjecting 230 participants to the EHS and Stanford Hypnotic Susceptibility Scale: Form C (SHSS:C). The EHS demonstrated adequate internal consistency (α = .78), its items showed good discriminating ability, and scores of the two scales were highly correlated (rho = .86). Results indicate that the EHS is a reliable and valid tool to assess hypnotizability. Further research is needed to establish its role as a surrogate for the SHSS:C.
Assessment of hypnotizability can provide important information for hypnosis research and practice. The Elkins Hypnotizability Scale (EHS) consists of 12 items and was developed to provide a time-efficient measure for use in both clinical and laboratory settings. The EHS has been shown to be a reliable measure with support for convergent validity with the Stanford Hypnotic Susceptibility Scale, Form C (r = .821, p < .001). The current study examined the factor structure of the EHS, which was administered to 252 adults (51.3% male; 48.7% female). Average time of administration was 25.8 minutes. Four factors selected on the basis of the best theoretical fit accounted for 63.37% of the variance. The results of this study provide an initial factor structure for the EHS.