To determine whether performance adjustment had rebounded in the alcohol and control groups on subsequent trials, we compared FSW amplitudes elicited by compatible and incompatible trials occurring two trials following errors and correct responses (i.e., 2-back accuracy) using an additional HLM. The waveforms depicted in Figure 4 appear to indicate that participants in all groups showed FSW compatibility effects by the second trial following errors. Current trial type was significant, F(1, 1923) = 82.28, p < .0001, indicating larger amplitudes overall on incompatible trials (M = −2.03 µV) than on compatible trials (M = −.84 µV). The Group × 2-back accuracy interaction also was significant, F(2, 1923) = 7.80, p < .001, indicating that the FSW was larger 2 trials following correct responses than 2 trials following errors in all groups, but this effect was especially large in the alcohol group (Ms = −1.83 & −0.02 µV, respectively), t(1923) = −8.48, p < .001. The effect was less pronounced for those in the placebo (Ms = −1.72 & −0.68 µV, respectively), t(1923) = −4.73, p < .001, and control groups
