Research advances in hypnosis: issues and methods

Rapport and Cognitive Skill Training in the Enhancement of Hypnotizability

The role of interpersonal rapport in facilitating the enhancements in hypnotizability produced by cognitive skill training was examined in two experiments. In Experiment 1 low hypnotizable subjects either received skill training or passively oriented training that was designed to facilitate rapport with the trainer without teaching subjects how to generate the responses called for by test suggestions. Subjects in the two treatments reported equivalently high levels of rapport with their trainer, but only those given skill training attained large gains on two hypnotizability posttests. Subjects given passive training did not differ from untreated controls at posttesting. In Experiment 2 subjects received skill training under conditions designed to either heighten or minimize rapport with the trainer. Those in the high rapport condition showed large hypnotizability gains on both posttests, whereas those in the low rapport condition failed to differ from no treatment controls in this regard. Our findings indicate that high rapport is not sufficient for producing training-induced enhancements in hypnotizability. However, the absence of such rapport may interfere with subjects' learning and applying skills that can enhance hypnotizability.

Types of suggestibility: Relationships among compliance, indirect, and direct suggestibility

It is commonly believed that direct suggestibility, referring to overt influence, and indirect suggestibility, in which the intention to influence is hidden, correlate poorly. This study demonstrates that they are substantially related, provided that they tap similar areas of influence. Test results from 103 students, 55 women and 48 men, were entered into regression analyses. Indirect suggestibility, as measured by the Sensory Suggestibility Scale for Groups, and compliance, measured by the Gudjonsson Compliance Scale, were predictors of direct suggestibility, assessed with the Barber Suggestibility Scale. Spectral analyses showed that indirect suggestibility is more related to difficult tasks on the BSS, but compliance is more related to easy tasks on this scale.

Items for assessing posthypnotic recognition amnesia with the HGSHS:A and the SHSS:C

A procedure for assessing posthypnotic recognition amnesia is described. A set of items for the Harvard Group Scale of Hypnotic Susceptibility, Form A and for the Stanford Hypnotic Susceptibility Scale, Form C were developed and analyzed for reliability and their ability to discriminate individuals who demonstrate posthypnotic amnesia. Recognition amnesia could be assessed as reliably as recall amnesia, and posthypnotic recognition amnesia identified a select subgroup of high hypnotizable individuals who had higher scores on the screening scales. These items may prove useful for assessing posthypnotic recognition amnesia in conjunction with widely used scales of hypnotic susceptibility.

Laser-induced pain-related brain potentials and sensory pain ratings in high and low hypnotizable subjects during hypnotic suggestions of relaxation, dissociated imagery, focused analgesia, and placebo

Pain reports and amplitudes of painful argon laser-induced brain potentials were obtained for 10 high and 10 low hypnotizable volunteers following placebo and a randomized sequence of four hypnotically induced conditions of (a) neutral hypnosis, (b) deep relaxation, (c) pleasant dissociated "out of body" imagery, and (d) focused analgesia of the hand. Both high and low hypnotizable subjects exhibited significant reductions of reported pain during conditions of neutral hypnosis, relaxation, dissociated imagery, and focused analgesia. High hypnotizable subjects displayed significantly greater reductions than low hypnotizables in all conditions except placebo. Both high and low hypnotizables exhibited significant reductions of reported pain in all five conditions as well as in the posthypnotic condition, when amplitudes of evoked potentials were compared to the prehypnotic baseline. Only the high hypnotizable group showed significant reductions in amplitudes when the data were recalculated to reflect relative changes compared to the average amplitude of the pre- and postconditions to compensate for a possible habituation effect indicated by the significantly lowered amplitudes in the posthypnotic condition. The results are discussed in light of a number of hypotheses concerning mechanisms of hypnotic analgesia.

The future of hypnosis through the remainder of the decade: a Delphi poll

We predicted the future of hypnosis for the next 10 years using the Delphi method--the best available forecasting tool. A panel of 89 experts in the field of hypnosis completed a 44-item questionnaire that addressed future developments in these areas: (1) training and preparation, (2) general applications of hypnosis, (3) theory, and (4) research. Also predicted was the likelihood of occurrence of certain cogent events in the field. Results indicated probable increases in emphasis in nearly all areas surveyed. We also solicited nominations for major contributors to the field of hypnosis, major books on hypnosis, and journals most likely to publish articles on hypnosis.

Contextual roles in clinical hypnosis and hypnotherapy: theory and applications

Context is a cognitive psychological term that has relevance to hypnosis and hypnotherapy. This paper has three purposes: (a) to review five major characteristics of contexts in light of contemporary experimental cognitive psychological findings, (b) to examine the role of contexts in hypnosis theories, and (c) to discuss applications of contexts in clinical situations. As a heuristic concept, the contextual theory can offer new insights into the understanding of various hypnotherapeutic techniques. Clinicians are encouraged to understand and apply contextual functions to their practice of hypnotherapy.

A validation study of a short-form hypnotic-experience questionnaire and its relationship to hypnotizability

This study investigated the validity of a 16-item scale inquiring about hypnotic experience, drawn from the Hypnotic Experience Questionnaire developed by Kelly (1985) to measure components of hypnotic experience. We administered the HEQ-S and the Harvard Group Scale of Hypnotic Susceptibility: Form A (HGSHS:A) to 198 students. Factor analysis of the scale produced three stable principal components accounting for 70% of the data variance: Dissociation/Altered State (DAS), Rapport (RAP), and Relaxation (REL). Subscales representing these three factors and a composite measure, "General Depth," were constructed. Subscale correlations with HGSHS:A scores were highest for the DAS subscale (.69) and lowest for REL (.41). Applications of the HEQ-S in clinical and research use are considered.