victor vroom's expectancy theory is based on the very simple assumption that
Name(s): Expectancy Theory of Motivation also known as Valence-Instrumentality- Expectancy Theory. Author: Victor H. Vroom developed the theory from his study on the motivation behind decision-making. Classification: Cognitive or Need-to-Know Motivation Theories. Year: 1964, Porter and Lawler provided an extension to the model in 1968.