Journal
PSYCHOPHYSIOLOGY
Volume 46, Issue 1, Pages 100-113Publisher
WILEY
DOI: 10.1111/j.1469-8986.2008.00756.x
Keywords
Psychopathic personality; P3 amplitude; Impulsivity; Reaction time
Funding
- University of British Columbia,
- Faculty of Arts
- Natural Science and Engineering Research Council of Canada
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Past studies have examined P3 amplitude as an index of cognitive function related to psychopathy with mixed results. Psychopathy is a heterogeneous set of dissociable traits, and no previous study has examined relationships between P3 and specific traits. A Two Process Theory (TPT) of psychopathy has recently been advanced predicting that P3 reductions are related to only one dimension. We evaluated the relationship between P3 and the two factors of the Psychopathic Personality Inventory (PPI) in 96 undergraduates who performed a visual task. One factor of the PPI, Self-Centered Impulsivity, is related to the dimension of the TPT predicted to underlie P3 reduction. Frontal amplitude reduction was uniquely and inversely related to this trait. The other PPI factor, Fearless Dominance, was associated with faster reaction times. Future work on psychopathic personality and P3 should evaluate whether relationships are unique to one personality dimension.
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