While neurobiological factors are known to play a role in human
aggression, relatively few studies have examined neuropsychological
contributions to propensity for violence. We previously
demonstrated cognitive deficits among men who committed domestic
violence (batterers) compared to non-violent controls. Batterers
had deficits in verbal ability, learning and executive
problem-solving ability. These findings led us to examine whether
executive control problems involving impulsivity contribute
to problems with behavioral control among batterers, and to
further examine their deficits in verbal functioning. Batterers
(n = 41) enrolled in a domestic violence program were
compared to 20 non-violent men of similar age, education, and
socioeconomic background on neuropsychological tests of executive
functioning, including impulsivity. Questionnaires and structured
clinical interviews were used to assess emotional distress,
aggression and self-reported impulsivity. Batterers showed greater
impulsivity compared to non-batterers on several neuropsychological
measures. Yet, the severity of these deficits was relatively
mild and not evident in all batterers. Consistent with our previous
findings, significant verbal deficits were again observed among
the batterers. These findings suggest that while impulsivity
may be a factor associated with domestic violence, it probably
is not the sole determinant of the strong relationship between
cognitive functioning and batterer status that we previously
observed. Both verbal expressive deficits and behavioral
impulsivity appear to be relevant variables in predisposing
men to domestic violence. (JINS, 2003, 9,
760–770.)