Answer: behavior modification
Step-by-step explanation:
The token system is a method used in behavior modification to reinforce desirable behavior and reduce unwanted behavior. Reinforcement is in the form of a valuable item which is given to the individual whose behavior is being modified. This reward/token can be used within the system, but is usually not a valid form of exchange outside the system. For example, while the chip used here is a suitable form of token, money is not.