An Experimenter Finds That a Certain Male Subject Always Has

Multiple Choice

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