After several injections,Windsor the terrier starts to yelp at the sight of hypodermic needles.The initial injection Windsor received is a(n):
A) conditioned stimulus
B) conditioned response
C) unconditioned stimulus
D) unconditioned response

Question

Quizplus · Accepted Answer

The initial injection is an unconditioned stimulus because it naturally (without prior learning) causes Windsor to yelp, which is an unconditioned response. Conditioning occurs when Windsor starts to yelp at the sight of the needles, indicating that the sight of the needles has become a conditioned stimulus through association with the injections.

After Several Injections,Windsor the Terrier Starts to Yelp at the Sight