Regarding the electrophysiological findings, we found significant FRN and P300 components in the fronto-central region following feedback in a risky decision-making task. Both the amplitude of the FRN and feedback-related P300 amplitude were modulated by the valence of the outcome. FRN and P300 amplitudes were larger in response to negative feedback than to positive feedback. These effects are found in previous studies and suggest that overall the task was suitable to elicit robust feedback-related brain potentials in this sample. With respect to the acute effects of alcohol on those feedback processing components, the results revealed differences in early versus later feedback processing: FRN and P300 amplitudes did not show a similar sensitivity to the effect of alcohol. In contrast to our hypothesis, no differences between the alcohol-intoxicated or placebo group were found on the FRN amplitude, indicating that the neural system supporting the rapid evaluation of unfavorable outcomes was not modulated by alcohol. In line with our hypothesis, feedback-related P300 amplitudes in response to negative feedback (i.e., balloon bursts) were reduced in alcohol-intoxicated individuals as compared to sober controls, and
