Because mandisa always picked up her newborn daughter when she cried, her daughter is now a real crybaby. in this case, picking up the infant served as a(n) for crying. select one:

In this case, picking up the infant served as a positive reinforcer for crying.

Explanation:

In operant conditioning, reinforcement is a strategy used to increase the likelihood of the appearance of a desired behavior by adding a reward or a favorable stimulus, this stimulus is called a reinforcer.

In this case, although Mandisa probably didn't want to increase the appearance of the crying behavior, she gave her daughter a positive reinforcement every time she cried, by picking her up. This way, picking her up acted like the stimulus that reinforced the behavior.

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answer; use multiple stimuli;