Grand average time-frequency plots of total event-related power, expressed as a change relative to the baseline period, at 4 to 55 Hz for the Fz electrode location are presented in Fig. 5a, and total event-related theta power timecourses in Fig. 5b. Repeated measures ANOVAs of the event-related theta power were carried out for the three latency windows as described above. While no effects were observed for the first time window (T1), alcohol reduced event-related theta power overall in the middle time window (T2), Table 1. INCONG stimuli elicited the largest event-related theta power in the late time window (T3) especially under placebo (Table 1). The conflict-related increase in theta power (i.e. INCONG vs CONG contrast) in T3 was significant under placebo (Fz: F(1,16) = 8.3, p<0.05; Cz: F(1,16) = 21.7, p<0.0005) but only marginally under alcohol (Fz: F(1,16) = 4.5, p<0.1; Cz: F(1,16) = 2.3, ns). Uncorrected theta power in the baseline period was unaffected by either beverage or condition.
