In classical conditioning,what is the UCS

A)  a previously neutral stimulus that has acquired the capacity to elicit a learned response 
B)  a stimulus that elicits a response without previous conditioning 
C)  a learned reaction to a stimulus that occurs as a result of previous conditioning 
D)  an unlearned reaction to a stimulus that occurs without previous conditioning

UCS

An acronym for Unconditioned Stimulus, which in classical conditioning theory is an event that naturally and automatically triggers a specific response without previous conditioning.

Classical Conditioning

A process of learning that takes place when there is a connection between an environmental trigger and a stimulus that occurs naturally.

Previously Neutral

Refers to a stimulus that initially elicits no innate response until it is paired with an unconditioned stimulus in the learning process of classical conditioning.