Victor Harold Vroom developed the Expectancy Theory of motivation which examines why people choose certain actions. The theory proposes that motivation is based on three factors: Expectancy, Instrumentality, and Valence. Expectancy refers to an employee's belief that effort will lead to certain outcomes. Instrumentality refers to the perception of whether desired outcomes will result from the first outcomes. Motivation Force is determined by the Valence, or value, of the potential outcome multiplied by the Expectancy and Instrumentality.