Self-efficacy theory maintains that self-efficacy expectancy, a belief about one's ability to perform a behavior successfully, is independent of outcome expectancy, a belief about the likelihood of the behavior leading to a specific outcome. To examine this hypothesis, subjects (N=95) read communications that differed in descriptions of the difficulty of learning and performing a behavior (self-efficacy expectancy) and the effectiveness of the behavior in producing a desired outcome (outcome expectancy). Results disclosed that increments in outcome expectancy increased intentions to perform the behavior. Increments in self-efficacy expectancy yielded nonsignificant increases in intentions. The outcome expectancy manipulation influenced expectations of self-efficacy. When the behavior was presented as relatively difficult to perform, subjects who believed the behavior was more likely to result in a favorable outcome expressed greater confidence in their ability to perform the behavior than those who perceived a relatively weak relationship between the behavior and its outcome. The degree of risk involved in attempting yet failing to perform correctly a behavior may determine the extent to which self-efficacy expectancy affects decisions about behavior. (Author)