| Sumario: | The article analyses race, sex, and class differences in ability to endure pain. In an effort to discover whether there are race, sex, or class differences in ability to endure pain with courage, the writers sent a questionnaire to 120 physicians and dentists. Of the 60 who replied, 12 stated that there are no race differences; 48 stated that there are, but, as one failed to rate the different races, no use could be made of his judgment in our calculations. As the doctors were asked to rate only those races with which they had had experience, the number rated by the different doctors naturally varied. The modal number rated was six. Researchers decided to make that the basis for estimating how much weight should be attached to the opinions of men of varying breadth of experience. Of the 60 who replied four did not answer the question regarding sex differences, and eight stated that there are no sex differences. Since those who did not reply probably have no decided views, researchers cannot go far wrong if we add them to those who said there are none.
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