The major difference between a conditioned stimulus and an unconditioned stimulus is

A) the order in which they are presented.
B) that one reliably elicits the response of interest prior to conditioning while the other does not.
C) that during conditioning the response to one increases while the response to the other decreases.
D) the strength of the response that each stimulus elicits.

Conditioned Stimulus

An initially neutral signal that, once linked with an unconditioned stimulus, ultimately elicits a conditioned response.

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers a response without prior learning.

Response of Interest

The specific reaction or outcome measured in a research study to evaluate the effects of various conditions or treatments.