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Assume the variable is positive, and find the root.
Primary Reinforcer
A naturally reinforcing item or outcome, such as food or water, that does not require learning to be considered rewarding.
Unconditioned Stimulus
In classical conditioning, a stimulus that naturally and automatically triggers a response without the need for prior learning.
Secondary Reinforcer
A stimulus that becomes reinforcing through its association with a primary reinforcer, such as money earning its value through its exchange for food or other needs.
Primary Reinforcer
A stimulus that is naturally rewarding and satisfying, such as food or water, which does not require learning to become desirable.
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