and pain relief. Some suggest that laughter activates similar brain wave frequencies as a meditative state. However, scientific studies of these benefits are limited and have methodological issues. See also Leisure Recreation References Further reading Brockton Art Center (Brockton, Mass.). American Pastimes: [exhibition catalog], Brockton Art Center, Fuller Memorial, Brockton, Massachusetts, Jan. 27-Apr. 17, 1977. Roger T. Dunn ... curator [and author of the] catalogue; research assistant, Richard Campbell. Brockton, Mass.: Brockton Art Center, Fuller Memorial; Bedford, Mass.: printed by W.E. Andrews Co., 1976. 44 obl. p., amply ill. Without ISBN External links Questionable Amusements and Worthy Substitutes by J. M. Judy Emotion Humour