Objective: Two experimental studies tested expectancy and impairment explanations for the association between alcohol consumption and unsafe sexual behaviors.
Method: Young adults, who were administered alcohol (blood alcohol concentration mean = .08 mg%), placebo or water, rated the likelihood that potential consequences would result from risky sexual practices (Study 1, N = 161) and listed potential consequences that could result from having sex without a condom (Study 2, N = 135).
Results: Intoxicated participants reported lower perceptions of risk (mean [+/-SD] = 4.5+/-2.1) than those who received placebo (mean = 5.8+/-1.3) or water (mean = 5.5+/-1.7). Intoxicated participants also listed fewer negative consequences (mean = 1.3+/-1.2) than those who received placebo (mean = 1.5+/-1.2) or water (mean = 2.1+/-1.5). In addition, participants who expected alcohol to disinhibit their sexual behavior reported stronger postdrinking perceptions of benefit (mean = 2.6+/-1.8) and indicated that they were more likely to engage in risky sexual practices (mean = 2.4+/-1.7) than those who did not expect sexual disinhibition (mean = 2.0+/-1.7, benefit; mean = 1.8+/-1.1, involvement).
Conclusions: Results support the hypotheses that (1) alcohol-related impairment reduces the drinker's perception of personal risk, and (2) positive outcome expectancies motivate drinkers to engage in risky sexual practices.