Abstract
The relation between the amplitude and latency of the P300 wave of the event-related brain potential and dimensions of personality assessed by the Eysenck Personality Questionnaire (EPQ) and the State-Trait Personality Inventory (STPI) was examined using an auditory version of the ‘oddball’ paradigm. Previous reports that P300 latency, an index of the speed of perceptual information processing, was inversely related to neuroticism were verified in the present study for males only. Furthermore, this inverse relation in males appeared to be due to neurotic anger more than neurotic anxiety, as reflected by a significant inverse relation between P300 latency and Trait Anger but not Trait Anxiety. P300 latency was also directly related to extraversion in males, but this relation may have been secondary to a negative correlation between extraversion and neuroticism. Previous findings of an inverse relation between extraversion and P300 amplitude were not replicated. P300 amplitude was also not related to psychoticism, suggesting that this personality dimension is not related to psychosis in the clinical sense.
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