An investigator presents a conditioned stimulus followed by an unconditioned stimulus until an animal is classically conditioned. Then she exposes the animal to an extinction procedure. If she waits a while and then tests the animal again, she is likely to see

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Spontaneous recovery is the reappearance of a conditioned response after a period of rest following extinction. Therefore, if the investigator tests the animal again after a break, she is likely to see spontaneous recovery. Backward conditioning involves presenting the unconditioned stimulus first followed by the conditioned stimulus, which is the opposite of the usual order, and is therefore unlikely in this scenario. Generalization and discrimination refer to the animal's ability to respond to stimuli that are similar or different to the conditioned stimulus, respectively, and are not directly relevant to the extinction and recovery of the conditioned response.

An Investigator Presents a Conditioned Stimulus Followed by an Unconditioned