one criterion for antisocial personality disorder stating ‘Impulsivity or failure to plan ahead’ (DSM-IV; APA, 2000). Accordingly, it has been hypothesized that the shared element across these disorders comprises a general predisposition to impulsivity. Alternatively, this shared factor has been labeled as behavioral disinhibition (Young et al., 2000) or externalizing (Krueger et al., 2005). Despite these subtle differences in nomenclature, all terms underscore a predisposition toward a lack of impulse control, and this constitutes the unifying construct shared across these common, frequently co-occurring conditions.
