points were changed across the three groups. Accuracy data (proportion correct) were transformed using arcsine of the square root, which normalizes variance across conditions to produce distributions more suitable for analysis of variance (ANOVA). However, for ease of interpretation, raw (untransformed) means are presented in the text and Table 1. Accuracy and RT were examined in separate 3 (Group: control, placebo, alcohol) × 2 (Current trial type: compatible, incompatible) × 2 (Previous trial accuracy: correct, incorrect) mixed factorial ANOVAs with repeated measures on the latter factors.
