Recent attempts to extend Heider's (1958) attributional model of person perception to the area of achievement motivation have important practical as well as theoretical implications. Specifically, it has been hypothesized (Kukla, 1972) that if causal attributions for success and failure determine achievement-related behavior, then a change in attribution will result in a corresponding change in behavior. The purpose of the present study is twofold: (1) to delineate several parameters relevant to the process of making causal ascriptions for success and failure; (2) to attempt to manipulate attributions, thereby altering achievement-related behavior.