LAUGHTER By N., Pam M.S. - May 11, 2013 A vocalization used to express joy, happiness or amusement. Created by the rapid contraction and relaxation of the stomach and through breathing. LAUGHTER: "The laughter of the crowd could be hear in the theatre." Related Psychology Terms BEHAVIORAL RELAXATION TRAINING MUSCLE TWITCH BREATHING RETRAINING GASTROCOLIC REFLEX GASTROINTESTINAL MOTILITY EYE MOVEMENTS RELAXATION THERAPY CAFFEINE EUDEMONISM (EUDAEMONISM) SALICYLISM Cite this page: N., Pam M.S., "LAUGHTER," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/laughter/ (accessed March 23, 2019).