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

The bright light acts as the Unconditioned Stimulus (UCS) because it naturally elicits a response without prior learning, and the pupil constricting is the Unconditioned Response (UCR) because it is an automatic, natural reaction to the stimulus.

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