with, and 2) received feedback/outcome about the selected amount (i.e., Loss 10, Loss 50, Gain 10, and Gain 50). The alcoholic group showed significantly decreased theta power during reward/outcome processing compared to controls. A strong association between reduced anterior theta power and impulsive task performance was also observed. Furthermore, alcoholics exhibited increased impulsivity and risk-taking on the behavioral measures. Similar studies in high-risk offspring of alcoholics are underway to further evaluate this ERO measure (anterior theta power) and determine whether it antecedes the development of alcoholism, and can serve as a potential endophenotype.