Reward processing deficits and impulsivity in high-risk offspring of alcoholics: A study of event-related potentials during a monetary gambling task

•Individuals at high risk (HR) to develop alcoholism manifest neurocognitive deficits.•ERPs, impulsivity and externalizing diagnoses were assessed.•HR offspring displayed lower P3 amplitude and weaker current source density.•HR offspring also showed increased impulsivity and externalizing features.•Reward related P3 can be an endophenotype for alcoholism and related disorders.