which provides evidence that this is a heritable trait (Kliethermes & Crabbe 2006). However, selective breeding for delay aversion or response inhibition has not occurred, presumably due to the complex nature of the tasks used to generate these behaviors and the possibility that impulsive behavior can occur through multiple mechanisms. Accordingly, the literature on selective breeding for ‘impulsivity’ phenotypes is more limited than that on animals selectively bred for differences in alcohol consumption.
