For both behavioral and imaging data the repeated measures ANOVAs (SPSS for Windows, SPSS Inc) were carried out with the factors of beverage (alcohol, placebo), and condition (SW, PW, AN). The ANOVAs were performed for each ROI event-related theta power averaged over time points in four time windows, T1 (110–160 ms), T2 (170–320 ms), T3 (370–520 ms), T4 (600–750 ms; Figure 2). Effects of lexical-semantic retrieval on theta power were examined by direct comparisons between the activity estimates to SW and PW, word-like, pronounceable letter strings with no meaning (Figure 3; Table 1). Conversely, a direct comparison between the SW and AN provided insight into the effects of decision conflict (Figure 4; Table 1). In addition, uncorrected baseline power estimates were submitted to the same analysis in order to examine potential effects of beverage and task condition for the −300 to 0 ms time window. In an effort to examine possible effects of session order, we also included the order effect in the statistical model for all dependent variables. However, no significant effects of session order were observed.
