Browsing by Subject "Case study"
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(2013)The hypnotic phenomena have long been debated. In scientific research, disagreements on the conceptual and methodological approach have led to controversial results and interpretations which heat up the debate. Additionally, hypnotic suggestibility is often measured only behaviourally, subjects are studied in masses and the role of individual responders is largely neglected. One way to reach beyond mere behaviour to the level of experience without losing the individual variability is by combining posthypnotic suggestions, self-reports, psychophysiological measurement techniques and a case study approach. The present study examined the effects of suggested changes in the visual colour perception of simple geometric shapes in the posthypnotic and the simulation condition as measured by self-reports, reaction times, error rates and event-related potentials (ERPs). The case study approach was chosen and the focus was set on two highly suggestible hypnotic responders. The comparative data for simulation were also obtained from a set of control subjects. Results indicated differences in processing between the posthypnotic and simulation condition seen in the behavioural performance and to a lesser extent in the posterior N2 and P3 peaks of the ERP waves. Evident dissimilarities were found also among highly suggestible hypnotic responders. These results support the occurrence of inimitable hypnotic modulations in some individuals and point out the need to examine hypnotic responders on a more individual basis.
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