One of the main problems with Expectancy Theory of motivation is that it does not identify the comparison other in the motivation process.

Expectancy Theory, primarily proposed by Victor Vroom, focuses on how individuals make choices based on their expectations of the outcome. It does not directly involve the concept of a "comparison other," which is more relevant to Equity Theory, where individuals compare their input-outcome ratios to those of others. Expectancy Theory instead emphasizes the relationships between effort, performance, and outcomes, without necessitating a comparison to others in the motivation process.