Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

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If a conditioned stimulus is repeatedly presented without the unconditioned stimulus, there is a tendency for the conditioned stimulus to no longer elicit the conditioned response; this phenomenon is called (a) _____. However, if some time later you again presented the psychology text to your roommate without giving him a brownie, he would show salivation, the conditioned response. This recurrence of the conditioned response after it has been extinguished is called (b) _____.