The history of ideas guiding the development of an attribution-based theory of motivation is presented. These influences include the search for a "grand" theory of motivation (from drive and expectancy/value theory), an attempt to represent how the past may influence the present and the future (as Thorndike accomplished), and the incorporation of causes and their properties (from Heider and Rotter). The goal of this approach is the formulation of a conception in which causes influence action via the mediating mechanisms of specific affects (as first suggested by Atkinson) and expectancy. The empirical and conceptual contributions of the theory are summarized. (Contains 5 figures.)