This thesis examines the following theory in several parts: across a wide range of experimental situations, changes in core body temperature (Tc) have been consistantly associated with inverse changes in sleep propensity. Previous research has focussed on the possible role that a declining Tc and distal vasodilation may play in normal nocturnal sleep onset. This research has lead to the suggestion that these changes in thermoregulation may mediate, or be functionally involved in, the regulation of sleep propensity in sedative-hypnotic agents.

Thesis (Ph. D.)--State University of New York at Binghamton, Department of Psychology, 2008. / Includes bibliographical references.

The present study tested the hypothesis that contiguity, regarding time of administration of the Tellegen Absorption Scale (TAS), differentially influences hypnotic susceptibility. Forty-eight subjects were administered the TAS immediately prior to assessment of hypnotic susceptibility versus 43 subjects who received the TAS one to three days before assessment of hypnotic susceptibility. Absorption, when measured in the temporally versus nontemporally contiguous context did not appear to affect hypnotic susceptibility. Absorption did, however, correlate significantly with hypnotic susceptibility in the temporally contiguous group as compared to a non-significant correlation in the nontemporally contiguous group. This finding suggests is a relationship between differential administration of the TAS with regard to time of administration and hypnotic susceptibility.

The present study was designed to test Frankel and Orne's hypothesis that persons with a clinically significant phobia also show high susceptibility to hypnosis. The hypnotic susceptibility scores of 10 persons who sought treatment with hypnosis for agoraphobia were compared with the susceptibility scores of a control group of 20 persons having comparable motivation to succeed in hypnosis. The susceptibility measure was the Stanford Hypnotic Susceptibility Scale: Form C (SHSS:C, Weitzenhoffer & Hilgard, 1962). The groups were also compared on: a) the Archaic Involvement Measure (AIM; Nash, 1984); b) the Field Depth Inventory (FDI; Field, 1965); and c) the Tellegen Absorption Scale (TAS; Tellegen & Atkinson, 1974). No significant differences were found between the groups on the dependent measures. Factors which qualify the results are discussed.

Hypnotic susceptibility, often regarded as a relatively stable individual characteristic, has been found to be related to the personality dimension of absorption. To test the hypothesis that this relationship is a function of the nature of the sensory response to stimulus events and the development of cognitive models pursuant to the processing of that information, a group of hospitalized, chronic pain patients were assessed on the following dimensions: absorption, clinical hypnotic responsiveness, cognitive resistance to interference, and visual automatization.

Dietary habits which seriously erode health and quality of life are widespread. Effective clinical strategies for overweight, obese and eating disordered individuals are needed. Such treatment options are usually based on constructs generated by theoretical models of causation and maintenance. Underpinning the current enquiry, the Hypno-socio-cultural model hypothesises links between the aetiology of dysfunctional eating behaviours and higher levels of hypnotic susceptibility, fantasy ability and dissociative capacity, as well as acknowledging the social genesis of the self-defeating approach to diet. Empirical evidence has supported the socio-cognitive theory of causation and remediation, on which this research is based. The literature has suggested that hypnotic, imaginative and dissociative strategies have contributed to clinical efficacy, and that aetiology and maintenance of such self-defeating eating might be linked to higher than average hypnotic susceptibility, imaginative ability and dissociative capacity. Generalization of research findings across studies is limited by the uncertainty introduced by the variety of measuring instruments utilized, and gender and age differences which have emerged. As well, possible individual preferences for specificity of hypnotic suggestions, which may affect responsivity levels, could dictate a need for reinterpretation of the results of relevant research. As an initial step in exploration of these issues, a group of University students responded to a number of assessment instruments, designed to tap self-perceptions in relation to weight, shape and size concerns, eating behaviours, and use of imaginative, dissociative and hypnotic capacities, as well as responding to hypnotic suggestions embedded in a formal assessment thereof. In this current research, expected relationships between elements of the Hypno-socio-cultural model were probably affected by a complex array of factors, which are difficult to measure using current instruments. Case studies drawn from the participants in this study have further elucidated the possible connections underlying the proposed Hypno-Socio-Cultural model, as well as highlighting the complexity of the relationships of all the factors involved. The Phenomenology of Consciousness Inventory, which was used to access the subjective experience of the individual’s responsivity to hypnotic suggestion, and which also tapped imaginative and dissociative experiences in relation to same, appears to have unique potential for further exploration of issues related to the connections highlighted in this study Findings in the current study suggested that some widely used assessments were not measuring the same constructs. Because of such factors, results which suggested links between weight, shape and eating measures, and those assessing hypnotic susceptibility, fantasy-proneness and dissociative capacity, although in the expected direction, were not as strong as was expected. In light of the anecdotal evidence of effective clinical use of imaginative, dissociative and hypnotic techniques with self-defeating eaters, the results were reassessed. It seemed feasible to interpret these results as suggesting that higher reliance on self-protective and defensive modes of using imaginative and dissociative capacities may mark the self-defeating eater. A modified Hypno-Socio-Cultural model, incorporating such a possibility, has been proposed as the basis for further study. It is recommended that such research be undertaken, employing a variety of relevant measures, with a larger group of participants of both genders with DSM-IV criterion diagnosed self-defeating eating. The importance to clincial work of investigating the proposed model as a basis for treatment remains paramount in this field of self-defeating eating.

Thesis (M.A.)--Carleton University, 1993. / Also available in electronic format on the Internet.

To test the hypothesis that a metaphorical technique would be more effective than a direct technique to induce hypnosis, 60 volunteers from students at North Texas State University were divided into high- and low-susceptible subjects by the Harvard Group Scale of Hypnotic Susceptibility. They were randomly assigned to direct and metaphorical induction groups and to a control group, with 10 high- and 10 low-susceptible subjects in each group. After hypnosis they completed the Field Inventory of Hypnotic Depth, and their mean scores were subjected to an analysis of variance and a Newman-Keuls test. Neither method of hypnotic induction was found more effective than the other, although both were effective when compared to a control group. It was also found that subjects who expected to be able to experience hypnosis were no more likely to be hypnotized than those who expected not to be able to experience hypnosis. Finally, it was found that low-susceptible subjects were as likely to respond to a post-hypnotic suggestion as high-susceptible subjects.

Hypnotic elicitation of multiple ego states was explored using Hilgard's "hidden observer" paradigm. Twenty subjects in two groups: hypnosis and simulation were utilized to examine the impact of experimental demand characteristics on the production of multiple ego states. Self-report and hypnotist-report measures were obtained in a test-retest design. Multiple t-tests and chi-square analyses were computed with significant differences on key multiple ego state items found between groups. Results demonstrated retest reliability, but not inter-rater reliability of this dissociative phenomena, since hypnotists failed to discriminate real from "faked" hypnotic involvement. Exploration of multiple ego states using non-hypnotic control conditions and multiple dependent measures is suggested for future research.

A comparison was made of two types of hypnotic suggestions. Twenty seven subjects in two groups participated in eight weekly one-hour group hypnotic sessions. All subjects were given the Minnesota Multiphasic Personality Inventory, the Tennessee Self-Concept Scale, and were weighed pre, post and at four month follow-up. Both types of hypnotic suggestions were equally effective in helping individuals lose weight. The average weight loss was 10 pounds at follow up. Both groups showed improvement on the personality tests. Those who received the ego-strengthening hypnotic suggestions showed more improvement and more long lasting improvement than did those who received the specific hypnotic suggestions.