Kuhn’s 15 stages of laughter I stumbled across Kuhn’s 15 stages of laughter in a paper by Ronald A. Berk (Berk, R. A. (2001). The active ingredients in humor: Psychophysiological benefits and risks for older adults. Educational Gerontology, 27:3-4, 323-339). Annoyingly, the source of the original article eludes me as