In search of an electrophysiological index for psychoticism

Joseph Glicksohn, Yulia Naftuliev

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1083-1092
Number of pages10
JournalPersonality and Individual Differences
Volume39
Issue number6
DOIs
StatePublished - Oct 2005

Keywords

  • Alpha power
  • EEG
  • Extraversion
  • Personality
  • Photic stimulation
  • Psychoticism
  • Theta power

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