Conditioning seldom occurs when a(n) repeatedly comes before a(n) stimulus-response pair; conditioned stimulus (cs) unconditioned stimulus (us); neutral stimulus (ns) secondary reinforcer; operant behavior negative reinforcer; operant behavior

Conditioning seldom occurs when a conditioned stimulus follows an unconditioned stimulus.

Explanation:

Classical conditioning was discovered by the researcher Ivan Pavlov when he performed experiments on the digestive response of dogs.

In classical conditioning, after several repetitions, the conditioned stimulus (which was previously neutral) becomes associated with an unconditioned stimulus which eventually triggers a conditioned response.

Example:

In school, you hear the sound of the bell (sound = conditioned stimulus) before lunch starts (food = unconditioned stimulus). As days pass, the sound of the bell makes you feel hungry (conditioned response).

your answer is "graduates" hope this