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Researchers from Oxford Cambridge and two German universities made their conclusions after a novel experiment examining the role of conscious thought in pain perception. 英国牛津大学、剑桥大学和德国二所大学的科研人员通过一系列实验之后得出结论，人的心态对疼痛感受起着重要作用。， First 22 volunteers had a pain device put on their skin that was too hot for comfort. 科研人员对22位志愿者进行过试验，他们首先用一种产生疼痛感觉的加热器具放在志愿者皮肤上，让它给志愿者造成烧灼感。 Each then had an intravenous line attached to deliver a powerful opiate-based painkiller. 然后，用威力强大的鸦片基止痛剂通过静脉注射到志愿者身上。 The volunteers were asked to rate the pain before any painkiller was introduced. The average score from 0 to 100 was 66. 静脉注射止痛剂前，志愿者根据0级到100等级对他们疼痛感觉给予评级，此时得到的平均值是66级。 Then the researchers started providing the painkiller without telling the volunteers they had done so. The average score dropped to 55. 然后，研究人员给志愿者静脉注射止痛剂，但不告诉他们这一事实，这次下跌到平均55级。 But when the scientists told them they had started administering the painkiller the score dropped again to 39. | 
