Classical Conditioning and the Pupil Dilation Response You will need a bell or other noise, a hand-held mirror, and a room that becomes completely dark when the light is turned off. Hold the bell while standing in the room near the light switch. Once in position, ring the bell and then immediately turn off the light. After waiting in total darkness for about 15 seconds, turn the light back on. Wait another 15 seconds with the light on, and then ring the bell and immediately turn the light back off (again waiting 15 seconds in the dark). Repeat this procedure 20 to 30 times, making sure that in each case the bell is rung immediately before the light is turned off. After numerous pairings, you are ready to see the results! With the light on, you should watch your eyes closely in the mirror and then ring the bell. Your pupils should dilate slightly even without a change in light. Please write about this experience in one to two paragraphs. Include how many pairings it took to "condition" yourself. If you'd like you may try to identify what is the neutral stimulus (NS), the unconditioned stimulus (US), the unconditioned response (UR), the conditioned stimulus (CS), and the conditioned response (CS). [We will review this in class PRIOR to you submitting your assignment!] Finally, please describe your personal reactions/thoughts to doing this activity.