For 6 days, 10 male and 10 female social drinkers performed a rotary pursuit task six times across each day under both placebo and alcohol-intoxicated conditions. Following a training period, O.35g/kg of alcohol or placebo beverages were administered 45 min before the second, third, and fourth sessions each day. In general, alcohol impaired the rotary pursuit performance of women more than that of men despite similar peak BAC levels. Results suggest no evidence of acute tolerance, evidenced by similar performance on the ascending and descending limbs of the BAC curve. However, results suggest that across the two alcohol administration days, men tended to develop some tolerance to the deleterious effect of alcohol on performance, whereas women became more sensitive to the effect of alcohol on performance. These results indicate that there may be gender differences in the effects of repeated alcohol administration on motor performance.Survey of the existing literature reporting the effects of alcohol on psychomotor and cognitive skills illustrates a substantial deficit in research using women as subjects compared to men. Lex (1991) suggested that this neglect has been primarily a function of widely held erroneous beliefs that sociocultural factors protect females from developing alcohol abuse and that alcohol abuse is similar in men and women. Research, however, indicates that age of onset, development and symptoms of alcoholism, and detrimental physiological effects are different for men and women. This underscores an increased need for research investigating the physiological and behavioral effects of alcohol in women