Resistance to alcohol impairment of visual-motor performance: does it help to pay attention?

In a 2 x 2 factorial design, moderately intoxicated (BAC = .05) college students (n = 40) were exposed to a cognitive set (to concentrate) and/or an auditory feedback signal while performing a modified pursuit-rotor task across five postbeverage trials. Self-reported "highness" was also assessed. A control group received placebo drinks and performed without aids. Hypothesized main effects for both set and signal revealed that intoxicated aided subjects outperformed their unaided counterparts. Moreover, subjects who received both aids outperformed all other intoxicated subjects and performed equivalently with unaided placebo subjects. Separate analyses of the first postbeverage trial and use of covariance analyses provided confidence that the obtained effects were not attributable to acute or chronic tolerance. Highness correlated negatively with performance; but set and signal effects on highness failed to reach significance. Although alcohol-induced motor impairment is not recognized in the research literature as being under volitional control, subjects in the present study exhibited clear resistance to alcohol impairment. Possible psychological mediators and moderators of the obtained effects are discussed, as well as the relevance of these findings for tolerance research. Practical implications are also considered.