Final answer:
In Rotter's model, the behavior most likely to be performed is the one with the highest expectancy because it is based on the belief that the behavior will lead to a desired outcome and is influenced by the reinforcement value.
Step-by-step explanation:
In Rotter's model of behavior, the behavior that is most likely to be performed in a given situation is A) The behavior with the highest expectancy. This model suggests that behaviors are determined by what individuals expect to happen following certain actions and the value of the reinforcement (or outcomes) they anticipate. If an individual believes that a behavior is likely to lead to a desired outcome (high expectancy), and the outcome is extremely desirable (high reinforcement value), they are much more likely to engage in that behavior. Therefore, expectancy and reinforcement value together determine the likelihood of a behavior being performed.
Julian Rotter's Social Learning Theory emphasizes that the potential for a behavior to occur depends not just on the reinforcement value, but also on the expectation that the behavior will lead to the desired reinforcement. Rotter referred to this as expectancy, where a higher expectancy for reinforcement increases the likelihood of a behavior occurring.