Pupillary size as an indicator of preference in humor

The effects of simple cartoons on pupil size were examined. Each of the 11 subjects was presented three cartoons for 10-sec. with a 5-sec. control period between the presentations. All subjects received the same task condition. When the presentation was complete, each subject ranked the three cartoons to show their preference on the dimension of humor. The data produced significant correlation between the rank order and the pupillary dilatation. Means of pupils size for the cartoons were also significantly different from control means.