To determine whether conflict monitoring had rebounded in the alcohol group on subsequent trials, N2 amplitude elicited by compatible and incompatible arrays occurring two trials following both errors and correct responses (i.e., 2-back accuracy) was analyzed using an additional HLM. The effect of Current trial type was significant, F(1, 1957) = 94.07, p < .0001, indicating larger amplitudes overall for incompatible trials (M = 0.18 µV) than compatible trials (M = 1.20 µV). The Group × 2-back accuracy interaction was significant, F(2, 1957) = 7.62, p < .001, indicating that the N2 was larger overall 2 trials following an error than 2 trials following a correct response for the placebo group (Ms = 0.99 and 1.36 µV, respectively; t[1957] = 2.05, p < .05), but not for the control group (Ms = 0.75 and 0.96 µV, respectively; t[1957] = 1.04, p = .30) or the alcohol group, for whom the N2 was smaller 2 trials following errors (M = 0.30 µV) than 2 trials following correct responses (M = −0.24 µV), t[1957] = −3.15, p < .01. Critically, the Group
