An experimenter finds that a certain male subject always has an increased heartbeat when he sees a picture of a nude female. The experimenter sounds a buzzer and then presents such a picture
The experimenter repeats this procedure until the man responds with an increased heartbeat to the sound of the buzzer alone. In this situation the unconditioned response (UR) is the _______________.
A) increased heartbeat
B) female's picture
C) sounds of the buzzer
D) viewing of the picture
Answer: A
Rationale: An unconditioned response (UR) is a reflexive, unlearned reaction to an unconditioned stimulus. In this example, the male subject's reflexive response to the picture of a nude female is to increase his heart rate. The other options are all stimuli, not responses.
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