Utilized the Personal Reaction Inventory (PRI-100) on a sample of 47 hospitalized female alcoholics and a control group of 47 individually matched nonalcoholic Ss. A measure of drinking behavior was established by the Volume Variability Index (V/V) administered to each S immediately prior to the administration of the PRI-100. A test-retest experimental design over a 2-week period yielded an average reliability coefficient of .88 for the PRI-100. The findings show that the personality characteristics associated with Assertive Antisocial Behavior, one of the factors of the PRI-100, are valuable predictors of drinking behavior. The two other personality factors of the PRI-100, Lack of Order and Lively Social Presence, were found to be unrelated to drinking behavior and therefore inadequate predictors.