Impulsivity is a multidimensional psychological trait that has been linked to addictive disorders and other mental health conditions. There is increasing evidence that specific forms of impulsivity are influenced by genetic variation, suggesting that these traits may be one intervening mechanism for genetic influences on health. However, most of the studies to date have had relatively small sample sizes and have not applied novel genome-wide approaches. Assessing impulsivity within the ALSPAC cohort will permit us to address these limitations and conduct a high-resolution investigation of impulsivity as a genetically-influenced risk factor for addictive disorders and related conditions.