Updating p300 an integrative theory of p3a and p3b

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In our recently published study ( we show that a blocking suggestion given under hypnosis has significant impact on visual perception and underlying brain responses measured via EEG.

Past research has shown that suggestions during hypnosis can have a deep impact on behavior and perception.

In our study, we used the suggestion of a perceptual blockade (Figure 1) to block visual perception.

All participants signed informed consent statements. The study was approved by the ethics committee of the Faculty of Social and Behavioral Sciences of the Friedrich Schiller University of Jena and followed the ethics declaration of Helsinki.In the control condition, participants were presented the same visual stimuli but without the suggestion of a wooden board in front of their eyes.During both conditions participant’s EEG was recorded. Counting performance was reduced for all participants, but the performance of high suggestible participants was the most deficient, see Figure 2.Further, we hypothesized that the P3b response to visual stimuli should be significantly reduced during the perceptual blockade compared to a control condition without blockade suggestion.The amount of the P3b reduction should be associated with deficient counting performance and a more realistic experience of the blockade.

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