If you shine a bright light directly into a person's eye, the pupil of the eye will reflexively constrict. Using Pavlov's terminology, the bright light would be termed the _____, and the pupil constricting would be termed the _____.
A) CS; UCS
B) CR; UCR
C) UCS; UCR
D) CS; CR

Question

Quizplus · Accepted Answer

In Pavlov's terminology, the bright light is an unconditioned stimulus (UCS) because it naturally triggers a response, and the pupil constricting is an unconditioned response (UCR) because it is a natural, reflexive reaction to the stimulus.

If You Shine a Bright Light Directly into a Person's