Orienting and humor responses: A synthesis

Evidence is presented for a hypothesis that a humor response is an instance of a more general orienting response. The two responses both occur to stimulus novelty or incongruity and are identical behaviorally and physiologically, althouth their subjective components may differ. Evidence for the hypothesis is based on a series of paremeters that affect orienting and humor responses identically. Parameters on which the responses show strong parallels are the effects of habituation and the degree of stimulus change. Weaker parallels exist for such parameters as direction of stimulus change, number of habituation trials, stimulus complexity, salience, intensity, and the subject's arousal level. The weaker parallels are also areas in which additional humor research is needed.