Performance accuracy differed as a function of stimulus type [main effect of condition, F(2,42) = 11.4, p < 0.001], with percent accuracy means (± SD) as follows: SW: 90.9 (±7.1), AN: 83.0 (±9.4), and PW: 92.9% (±12.9), Figure 1. Subjects responded least accurately to AN compared to both SW, F(1,21) = 21.7, p < 0.001, and PW, F(1,21) = 21.1, p < 0.001. Performance accuracy was only marginally decreased by alcohol overall, F(1,21) = 3.3, p < 0.09, but beverage comparisons were not significant for any individual condition. Reaction times were significantly increased by alcohol overall as indicated by a main effect of beverage, F(1,21) = 5.438, p < 0.05, with means (±SD) of 811 ± 119 ms for alcohol and 777 ± 105 ms for placebo. The overall response speed did not differ between SW and AN.
