Mike and Jeff are brothers who have just moved with their parents into a beautiful old house. Mike soon discovers that if he flushes the toilet while Jeff is taking a shower, it will cause the water in the shower to become scalding hot. Naturally, Jeff screams as his reflexes cause him to leap backward in pain. After Mike has repeated this procedure several times, Jeff has begun to twitch involuntarily every time he hears any toilet flush. In this example, twitching involuntarily every time he hears the toilet flush would be the
A) conditioned response (CR).
B) conditioned stimulus (CS).
C) unconditioned response (UR).
D) unconditioned stimulus (US).

Question

Quizplus · Accepted Answer

The involuntary twitching in response to the toilet flushing is a conditioned response (CR) because it is a learned reaction to a previously neutral stimulus (the sound of the toilet flushing) that has become associated with an unconditioned stimulus (the scalding water).

Mike and Jeff Are Brothers Who Have Just Moved with Their