In the context of infant development, extinction is the decrease in frequency of a response due to absence of reinforcement.

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Extinction in behavioral psychology refers to the process by which a previously reinforced behavior is weakened by the absence or removal of reinforcement, leading to a decrease in the frequency of the behavior. In the context of infant development, this can apply to behaviors such as crying or tantrums that are no longer reinforced by parental attention, eventually leading to a decrease in these behaviors.

In the Context of Infant Development, Extinction Is the Decrease