What refers to an perception of how effective a behavior will be in any particular circumstance?

Expectancy refers to an individual's perception of how effective a certain behavior will be in achieving his or her desired outcome/Goal in any particular circumstance or situation. In simpler terms, expectancy involves predicting, in some manner, future events or consequences that stem from one's actions and behaviors. Expectancy may involve beliefs about possible personal control over or causation of these particular situations or experiences.