Answer: Instrumentality
Step-by-step explanation:
Instrumentality component of expectancy theory is the concept that describes about expectation of person that he/she will receive a good reward if they are able to meet expectations of performance or task.It acts a belief in people which provokes them to work as per performance expectation.
According to the question,rewarding action of Peso Bank's president whenever he sees good service provided by employees to customer is not the technique to motivate employees to work as they can pretend to work nicely in front of president .Therefore, employees should be rewarded when they meet performance expectation of the job .