After a scary biking accident, Alex extinguished his conditioned fear of bikes by cycling on a safe biking trail every day for a week. The reappearance of his previously extinguished fear when he rode a bike on the same trail two weeks later best illustrates
a. discrimination
b. operant behavior
c. generalization
d. spontaneous recovery

d. spontaneous recovery

Explanation:

Spontaneous recovery is when a behavior that was thought to be gone, returns. In the example given this behavior is fear.

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D

Explanation:

Spontaneous recovery can be defined as the reappearance of the conditioned response after a rest period or period of lessened response. If the conditioned stimulus and unconditioned stimulus are no longer related in any way, extinction will occur very rapidly after a spontaneous recovery.

The conditioned stimulus ( fear of riding a bike so as not to have an accident) and the unconditioned stimulus (riding a bike), now this two stimulus are no longer associated making his fear go into extinction owing to Alex cycling on a safe biking trail everyday for one week. But two weeks later after a period of rest his fears return to this stimulus riding a bike on the same trail this best illustrates spontaneous recovery(reapperance of the conditioned stimulus).

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