Kitahata L M, Day R L, Kao F F, Motoyama E K, Hardy J D
MMW Munch Med Wochenschr. 1976 Apr 2;118(14):425-8.
Four volunteers judged eight levels of thermal stimuli induced by a Hardy dolorimeter, varying in intensity from extremely painful to a low level seldom even perceived. Half of the 406 stimuli were applied during acupuncture and half either before the insertion or after removal of the needles. The experimental design minimized or eliminated factors other than the needles themselves; i.e. no medications were given; the subjects were scientists accustomed to objectivity and, on a preceeding day or days, all became experienced in assigning a number (individually chosen) to the sensation produced by the different stimuli. Galvanic skin resistance was also tested. The results did not show any influence of acupuncture on pain perception or galvanic skin resistance.
四名志愿者对由哈代压痛计产生的八级热刺激进行了判断，刺激强度从极其疼痛到低至几乎难以察觉不等。406次刺激中有一半是在针刺过程中施加的，另一半则是在进针前或出针后施加的。该实验设计将除针本身之外的其他因素降至最低或消除；即未给予任何药物；受试者是习惯保持客观的科学家，并且在前一天或几天里，所有人都已熟练掌握为不同刺激产生的感觉赋予一个数字（自行选择）的方法。还测试了皮肤电反应。结果未显示针刺对疼痛感知或皮肤电反应有任何影响。
