Alan always turns the aquarium light on before putting fish food into the tank.After a while he notices that the fish swim to the top to look for the food as soon as he turns on the light.In this example,__________ is the unconditioned stimulus (US).
A)Alan
B)the opening of the tank
C)the fish food
D)the aquarium light

Question

Quizplus · Accepted Answer

The unconditioned stimulus (US) is the natural stimulus that elicits an unlearned response, in this case it is the fish food because it naturally causes the fish to swim to the top to search for the food. The other options are not natural stimuli that would cause the fish to respond in this way.

Alan Always Turns the Aquarium Light on Before Putting Fish