Dr. Graham exposes rats to a vanilla scent prior to receiving a food pellet in the left corner of their cage, but provides no food after exposure to a lemon scent. After several trials, upon smelling a vanilla scent, the rats wait at the far left corner of the cage regardless of whether a food pellet is present. However, they do not wait in the far left corner when exposed to the lemon scent. What is the unconditioned stimulus in the experiment?

Question

Quizplus · Accepted Answer

The unconditioned stimulus is the food pellet, as it naturally elicits a response (waiting in the corner) without prior conditioning.

Dr Graham Exposes Rats to a Vanilla Scent Prior to Receiving