Two experiments were performed to test whether a small dose of alcohol (0.67 ml/kg) would produce faster increments in simple auditory reaction time with time on task than a 0 dose to 60 db (Exp. I) and 40 db (Exp. II) signals. Analysis indicated no such effects of alcohol but mean number and mean duration of extreme long reactions (blockings) increased as an effect of alcohol. The latter effect, however, was not related to time on task.
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