Question

N classical conditioning, the ________ is an unlearned reaction to a given stimulus. for example, if you have an allergy to pollen and sneeze, sneezing is an unlearned reaction to the pollen (i.e., the stimulus).

Answer 1

The correct answer is unconditioned response.
According to Ivan Pavlov, the psychologist who came up with classical conditioning, an unconditioned response is something that happens naturally as a result of an unconditioned stimulus. For example, when you smell food (unconditioned stimulus) you might start to feel hungry (unconditioned response) - that's not something you learn.