Psychoticism and EEG

What is it about?

We set out to investigate the potential of an EEG-based index for the Eysenckian personality trait of Psychoticism (P). Our study addresses both restful-wakefulness EEG and the use of an EEG activation method (photic driving). A total of 33 volunteer participants provided us with adequate EEG recordings with eyes closed, and of these 28 provided us with useable data for all photic-stimulation conditions. High P (P+) participants, who comprise 25% of the final sample, are clearly differentiated in terms of an alpha/theta power ratio from low P (P−) participants. For P− there is little differentiation in the alpha/theta power ratio across conditions of photic stimulation; for P+, differentiation is quite high, suggesting a differential responsivity. For P+ participants, in marked contrast to P−, the theta oscillatory system is most responsive to a 6 Hz driving frequency.

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Perspectives

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Yulia's MA thesis with me extends the research first reported in ICP, 1996, employing photic stimulation, to address the question of a P-related index of EEG arousability or reactivity.

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