Positive reinforcement involves adding a rewarding stimulus to increase the likelihood that a desired behavior will be repeated.
It's like when your parents give you money for every A grade on your report card. The money (rewarding stimulus) increases the chances that you'll study hard and aim for A grades (desired behavior) in future exams.
Reward System: A set of neurological structures responsible for incentive salience (i.e., motivation and "wanting", desire, or craving for a reward).
Primary Reinforcer: Something necessary for survival such as food or water. These can be used as rewards in positive reinforcement scenarios.
Secondary Reinforcer: Something which isn't inherently valuable, but has become desired through association with primary reinforcers. Money is an example.
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