Claxton G
Percept Mot Skills. 1975 Aug;41(1):335-8. doi: 10.2466/pms.1975.41.1.335.
When we tickle ourselves something prevents the sensation being as strong as when someone else does it. It is suggested that the "something" may be: (i) the predictability of the stimulus; (ii) the presence of feedback from the movement of the arm doing the tickling; (iii) the presence of a corollary discharge from the voluntary movement of the tickling arm; (iv) the absence of a social/sexual context. To study these, Ss rated perceived "tickle-strength" in situations where they were tickled: (a) with their eyes closed; (b) with their eyes open; (c) with their own arm doing the tickling, but being moved by someone else; (d) by themselves. One group of Ss was divided into same sex and different sex subject-experimenter pairs. The results showed significant effects of predictability and sensorimotor feedback.
当我们自己挠自己时，某种因素会使这种感觉不如别人挠我们时强烈。有人提出，这种“因素”可能是：（i）刺激的可预测性；（ii）挠痒痒的手臂运动产生的反馈的存在；（iii）挠痒痒手臂的自主运动产生的伴随放电的存在；（iv）缺乏社会/性背景。为了研究这些，受试者在以下被挠痒痒的情况下对感觉到的“痒痒强度”进行评分：（a）闭眼；（b）睁眼；（c）用自己的手臂挠痒痒，但由别人移动；（d）自己挠自己。一组受试者被分成同性和异性的受试者-实验者对。结果显示出可预测性和感觉运动反馈的显著影响。
