Relations between tickling and humorous laughter: preliminary support for the Darwin-Hecker hypothesis.

Following hypotheses by Darwin and Hecker on the connection between tickling and humorous laughter, questionnaire data were collected from 100 college students regarding their reported ticklishness and tendencies to laugh and show responses ancillary to laughter. Ticklishness was related to propensities to: (a) giggle, (b) laugh, (c) smile, (d) piloerect, (e) blush, and (f) cry. These findings lend preliminary support for the Darwin-Hecker conjecture that reflexes underlying ticklishness mediate humor. We speculate on possible relations among tickling and humor, and reasons why people laugh and smile when they find things funny.