An experimenter finds that a certain male subject always has an increased heartbeat when he sees a picture of a beautiful actress. 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 CONDITIONED response is the ________.
◦ viewing of the picture
◦ beautiful actress's picture
◦ sound of the buzzer
◦ increased heartbeat
◦ male subject