What is the unconditioned response?

• A. Unconditioned Response (UR)
• B. Conditioned Response (CR)
• C. Neutral Stimulus (NS)
• D. Unconditioned Stimulus (US)

Answer: (A)

In classical conditioning, the unconditioned response is the automatic, reflex-like reaction that happens in response to an unconditioned stimulus, without any prior learning. For example, if meat powder is presented to a hungry dog, the dog’s salivation occurs naturally as a reflex. That salivation is the unconditioned response. The idea is that the response is innate and not trained. This differs from the conditioned response, which is the learned reaction to a previously neutral stimulus after it’s paired with the unconditioned stimulus, and from the neutral stimulus, which initially produces no response. The unconditioned stimulus is the stimulus that naturally triggers the reflex without learning. So the correct concept here is the automatic response to an unconditioned stimulus—the unconditioned response.