一般情况下,经过治疗后病情有改善的病人,不会吝啬表露出高兴与对医生的称赞;而无效果的病人,大多数都不愿意表态,甚至会夸大有效果,因为他们还抱有希望. 所以,问卷调查出来的统计结果,解读有效/无效果的比率都应该有所调整.

" Neither the people nor the doctors have any incentive to say that the procedure does not work when it doesn't work."