Both positive and negative reinforcement serve to strengthen wanted behavior.
Negative reinforcement is a process by which a behavior is strengthened by avoiding, removing or stopping the negative outcomes. The undesirable outcomes can be removed by performing such behavior.
Positive reinforcement is the opposite of the Negative reinforcement. In this process a behavior is established by rewarding for that behavior.
So we can conclude that both positive and negative behavior can serve to strengthen wanted behavior.
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