The observation of a connection between impulsivity and alcohol use/problems is not unique to human populations. It has also been observed in studies with non-human primates, rats and mice. As in humans, pre-existing differences in impulsivity have been correlated with differences in alcohol-related behavior. For example, mice exhibiting greater impulsivity, as measured by a delay discounting task, exhibit significantly less locomotor stimulation on their initial ethanol exposure, suggesting reduced alcohol sensitivity (Mitchell et al. 2006).
