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Coins and bills are portable and durable.
Pleasant Event
An occurrence or activity that brings joy, satisfaction, or positive feelings to an individual.
Unpleasant Event
An occurrence that is not enjoyable or satisfying, often causing discomfort or distress.
Primary Reinforcer
A naturally reinforcing item or factor, such as food or water, that does not require learning to be effective in increasing the likelihood of a response.
Secondary Reinforcer
A stimulus that becomes reinforcing through its association with a primary reinforcer; also known as a conditioned reinforcer.
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