For peak FRN and P300 amplitudes, a repeated measures ANOVA was performed with Group (alcohol versus placebo) as between-subject factor and Feedback (positive versus negative) and Electrode Site (three midline sites—Fz, FCz, and Cz) as within-subject factors. To control the increase in type I error, Greenhouse–Geisser corrections were adopted where appropriate. Post hoc tests were performed using the Bonferroni correction with a significance level of p <0.05.
