The extent to which different phenotypes related to impulsivity uniquely predict liability for addiction-related behaviors has not been entirely explored, but the available data indicates that a number of the measures are linked with a heritable susceptibility for drug use in humans and animals. Tests of action inhibition (stop signal inhibition,257, 5CSRTT83, 84 and reversal learning80), delay discounting32 and risky decision-making258 all appear to have a predictive value, in this regard. While few studies have directly compared their predictive value using standardized procedures, one such study that did suggested that action inhibition and delay discounting predicted dissociable aspects of drug self-administration.84
