Evidence for a heritable brain basis to deviance-promoting deficits in self-control |
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Authors: | James R Yancey Noah C Venables Brian M Hicks Christopher J Patrick |
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Institution: | 1. Department of Psychology, Florida State University, Tallahassee, FL, United States;2. Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, United States |
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Abstract: | PurposeClassic criminological theories emphasize the role of impaired self-control in behavioral deviancy. Reduced amplitude of the P300 brain response is reliably observed in individuals with antisocial and substance-related problems, suggesting it may serve as a neurophysiological indicator of deficiencies in self-control that confer liability to deviancy.MethodsThe current study evaluated the role of self-control capacity—operationalized by scores on a scale measure of trait disinhibition—in mediating the relationship between P300 brain response and behavioral deviancy in a sample of adult twins (N = 419) assessed for symptoms of antisocial/addictive disorders and P300 brain response.ResultsAs predicted, greater disorder symptoms and higher trait disinhibition scores each predicted smaller P300 amplitude, and trait disinhibition mediated observed relations between antisocial/addictive disorders and P300 response. Further, twin modeling analyses revealed that trait disinhibition scores and disorder symptoms reflected a common genetic liability, and this genetic liability largely accounted for the observed phenotypic relationship between antisocial-addictive problems and P300 brain response.ConclusionsThese results provide further evidence that heritable weaknesses in self-control capacity confer liability to antisocial/addictive outcomes and that P300 brain response indexes this dispositional liability. |
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