Cortical event-related potentials show the structure of hypnotic suggestions is crucial

Author(s): Barabasz, M., Jensen, S., Calvin, S., Trevisan, M., Warner, D.

Journal/Book: Int J Clin Exp Hypn. 1999; 47: 2455 Teller Rd, Thousand Oaks, CA 91320, USA. Sage Publications Inc. 5-22.

Abstract: Electroencephalographic cortical event-related potentials (ERPs) are affected by information processing strategies and are particularly appropriate for the examination of hypnotic alterations in perception. The effects of positive obstructive and negative obliterating instructions on visual and auditory P300 ERPs were tested. Twenty participants, stringently selected for hypnotizability, were requested to perform identical tasks during waking and alert hypnotic conditions. High hypnotizables showed greater ERP amplitudes while experiencing negative hallucinations and lower ERP amplitudes while experiencing positive obstructive hallucinations, in contrast to low hypnotizabies and their own waking imagination-only conditions. The data show that when participants are carefully selected for hypnotizability and responses are time locked to events, rather robust physiological markers of hypnosis emerge. These reflect alterations in consciousness that correspond to participants' subjective experiences of perceptual alteration. Accounting for suggestion type reveals remarkable consistency of findings among dozens of researchers.

Note: Article Barabasz A, Washington State Univ, Attent Proc Lab, Cleveland Hall, Pullman,WA 99164 USA

Keyword(s): HYPNOSIS; SUSCEPTIBILITY; PAIN; HALLUCINATION; ENHANCEMENT; AMPLITUDES

Zurück | Weiter