control (rs ≥ −.47, ps < .05). This association was absent in the alcohol group, however (r = −.09, p > .30). A multiple regression model in which PDP control scores were regressed on beverage group (coded 0 = alcohol, 1 = no alcohol), ERN amplitude (mean centered) and their interaction showed a marginal interaction effect, β = −.36, p = .07, indicating that the associations differed as a function of alcohol.
