On the first trial of an experiment on classical conditioning, the CS elicits __________ and the UCS elicits __________.

Question

Quizplus · Accepted Answer

On the first trial of classical conditioning, the CS (conditioned stimulus) is presented for the first time and does not yet elicit a response, so the answer is "no response" for the CS. The UCS (unconditioned stimulus) is typically a biologically significant stimulus that elicits an unconditioned response (UCR) without any prior learning. Therefore, on the first trial the answer for UCS is "the UCR". Choice D is the only option that fits this criteria.

On the First Trial of an Experiment on Classical Conditioning