Clarifying relations between dispositional aggression and brain potential response: overlapping and distinct contributions of impulsivity and stress reactivity.
Impulsive-aggressive individuals exhibit deficits in amplitude of the P3 brain potential response, however, it remains unclear how separable dispositional traits account for this association. The current study sought to clarify the basis of this association by examining contributions of trait impulsiveness and stress reactivity to the observed relationship between dispositional aggression and amplitude of the P3 brain potential response in a visual novelty-oddball procedure. A significant negative association was found between aggressiveness and amplitude of P3 response to both target and novel stimuli over frontal-central scalp sites. Impulsivity showed a parallel inverse relationship with P3 amplitude, attributable to its overlap with dispositional aggression. In contrast, stress reactivity did not exhibit a zero-order association with P3 amplitude, but modestly predicted P3 in a positive direction after accounting for its overlap with aggression. Results are discussed in terms of their implications for individual difference variables and brain processes underlying impulsive-aggressive behavior.
Florida State University, Department of Psychology, USA. venables@psy.fsu.edu
Noah C
NC
Venables
Christopher J
CJ
Patrick
Jason R
JR
Hall
Edward M
EM
Bernat
D000293:Adolescent; D000328:Adult; D000374:Aggression; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D004569:Electroencephalography / Q000379:methods; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005260:Female; D006801:Humans; D007175:Impulsive Behavior / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D010551:Personality; D010556:Personality Tests; D013315:Stress, Psychological / Q000503:physiopathology*; D055815:Young Adult
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