I/O Psychology Project Positive Reinforcement

[Please note this video includes music but the students do not speak] This video project shows the effects of positive reinforcement in the workplace.

Two employees receive certifications as they start work. In the next scene you see the two employees working efficiently.

In the first week, their manager puts star stickers on a positive reinforcement tracking sheet to reward them for their work. In the second week, the employees receive star stickers in exchange for their work; Employee A receives a candy bar in addition to the stickers and Employee B does not. In the third week, the manager gives Employee A a pay increase that he doesnt extend to Employee B. What happens in weeks four and five?

Has this clip sufficiently shown positive reinforcement? Would this method be useful in the workplace?