Multiple Choice
A rat has been trained in an operant-conditioning chamber to press a lever to get a food pellet. Following the acquisition trials, the researcher then withheld reinforcement for lever pressing and eventually the rat stopped responding. This example illustrates:
A) the effect of negative reinforcement.
B) the effect of punishment by application.
C) learned helplessness.
D) extinction.
Correct Answer:

Verified
Correct Answer:
Verified
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