Answer: behavior modification
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.
Answer:
She has gained a tolerance to caffeine
Explanation:
By drinking coffee everyday, her body has gotten used to the elevated level of caffeine in the morning. This has raised her tolerance to it, making it harder to feel the same effect from a single cup.
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