In testing Weiner's (1972) attribution theory of achievement behavior, success was found to produce (1) no differential attribution to effort for those high and low in achievement motivation, and (2) an early performance asymptote for those high in achievement motivation, while (3) it also facilitated performance independently of attributions. The process of requesting causal attributions facilitated performance independently of success and led to an early performance asymptote for those low in achievement motivation receiving success, while facilitating performance for those high in achievement motivation receiving success. (Author)