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Handedness and psychopathy

Handedness and psychopathy

Neuropsychiatry, Neuropsychology, and Behavioral Neurology 13(4): 233-238

The current study investigated whether psychopathic persons exhibit a pattern of motor dominance that differs from the left-hemisphere dominance that characterizes the majority of the population. Research with cognitive tasks suggests that psychopathy may be associated with an atypical pattern of cerebral organization characterized by either left-hemisphere dysfunction or decreased hemispheric asymmetry. However, studies that evaluate motor dominance in psychopathy have provided mixed results. The handedness of 420 adult male inmates at a county jail was assessed using a scale developed by Chapman and Chapman as part of their participation in ongoing research. Psychopaths reported reduced right-hand dominance, which cannot be accounted for by differences in age, intelligence, or race. Psychopathy is associated with an increased proportion of mixed-handedness relative to that seen in nonpsychopathic persons. This finding is consistent with theory and research suggesting anomalous cerebral asymmetry in psychopathic offenders.

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Accession: 046211213

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PMID: 11186158

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