After using instrumental conditioning to train a rat to press a lever for food, the researchers begin extinction trials. For one week after completing the extinction trials, the rat rested, receiving no training or intervention from the researchers. After that week, the researchers placed the rat back in the experimental box, and the rat immediately ran to press the lever. This rat's behavior best illustrates ________.
a. regression
b. fading
c. spontaneous recovery
d. resurgence
Ans: c. spontaneous recovery.
This rat's behavior illustrates spontaneous recovery, which is the reappearance of an extinguished response following a rest period after extinction.
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