The process of withholding reinforcement from a previously reinforced behavior to decrease the probability of the behavior occurring in the future. It is essential to know the function of the behavior for extinction to be an effective strategy. For example, if a learner tantrums to get his/her parents attention, then no attention should be given to the tantrum. Tantrums will eventually fade out. Ethically, it is important to teach an acceptable, functional replacement behavior such as functional communication (i.e. asking for a hug).

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