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Neurophysiological correlates of post-hypnotic alexia: a controlled study with Stroop test.

Casiglia, E; Schiff, S; Facco, E; Gabbana, A; Tikhonoff, V; Schiavon, L; Bascelli, A; ... Amodio, P; + view all (2010) Neurophysiological correlates of post-hypnotic alexia: a controlled study with Stroop test. Am J Clin Hypn , 52 (3) pp. 219-233. 10.1080/00029157.2010.10401721.

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Abstract

To clarify whether hypnotically-induced alexia was able to reduce the Stroop effect due to color/word interference, 12 volunteers (6 with high and 6 with low hypnotizability according to Stanford Hypnotic Susceptibility Scale Form C) underwent a Stroop test consisting of measuring, both in basal conditions and during post-hypnotic alexia, the reaction times (RT) at appearance of a colored word indicating a color. In basal conditions, RT were greater in case of incongruence. In highly hypnotizable participants, the interference was less pronounced during post-hypnotic alexia (-34%, p = 0.03). During alexia, late positive complexamplitude was also greater for congruent than incongruent conditions (p < 0.03), and cardiovascular response to stress was less pronounced as well. In participants showing low hypnotizability, no reduction of Stroop effect was detected during post-hypnotic alexia. Posthypnotic alexia is therefore a real and measurable phenomenon, capable of reducing the color-word interference and the haemodynamic effects of the Stroop test.

Type: Article
Title: Neurophysiological correlates of post-hypnotic alexia: a controlled study with Stroop test.
Location: United States
DOI: 10.1080/00029157.2010.10401721
Keywords: Adult, Arousal, Brain Mapping, Cerebral Cortex, Color Perception, Dyslexia, Acquired, Electroencephalography, Evoked Potentials, Female, Hemodynamics, Humans, Hypnosis, Image Processing, Computer-Assisted, Imaging, Three-Dimensional, Male, Reaction Time, Semantics, Signal Processing, Computer-Assisted, Stroop Test, Suggestion
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > Institute of Cardiovascular Science
URI: http://discovery.ucl.ac.uk/id/eprint/1428764
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