Doctoral Dissertations

Date of Award

8-1993

Degree Type

Dissertation

Degree Name

Doctor of Philosophy

Major

Psychology

Major Professor

Michael R. Nash

Committee Members

John Lounsbury, Michael Johnson, Bruce MacLennan

Abstract

This research investigates the reliability and validity of the Computer-Assisted Hypnosis Scale (CARS), a twelve-item computer-administered hypnotic ability scale. In a counterbalanced, within-subjects, repeated measures design, 130 subjects experienced both a computerized hypnosis (CARS) and a hetero-hypnosis (SRSSrC). For each hypnosis, responsiveness was assessed along three dimensions: behavioral (using the CARS and SRSS:C), subjective depth (using the Field Depth Inventory), and relational involvement (using the Archaic Involvement Measure). Subjects also completed a SRSS:C self-scoring measure and the Tellegen Absorption Scale. The CARS was shown to be a psychometrically sound instrument for measuring hypnotic ability. The various dimensions of CARS hypnotic responsiveness were highly positively related, and the CARS compared favorably with the SRSS:C across the three dimensions assessed. However, an unexpected interaction effect emerged: For the three dimensions of hypnotic responsiveness assessed, SRSS:C scores were lower when the SRSS:C was preceded by a CARS than when the SRSS:C administration was first. CARS scores for the three dimensions were not significantly affected regardless of whether or not a SRSS:C administration preceded the CARS administration. Results are discussed in terms of the theory and practice of hypnotic ability assessment, and directions for future research are noted.

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