Cowan M A, Watkins B A, Davis W E
J Clin Psychol. 1975 Jul;31(3):442-4. doi: 10.1002/1097-4679(197507)31:3<442::aid-jclp2270310315>3.0.co;2-n.
MMPIs were obtained from eight groups of black and white, schizophrenic and nonschizophrenic, and highly educated and poorly educated psychiatric patients. Profiles were classified blindly by use of two rules (Sc greater than 70; Sc greater than PT). All but poorly educated blacks were classified correctly beyond a chance level. Almost half of the poorly educated black nonschizophrenics were misclassified as schizophrenic. Implications for diagnostic work were discussed.
基质金属蛋白酶抑制剂（MMPIs）取自八组患者，包括黑人和白人、精神分裂症患者和非精神分裂症患者，以及高学历和低学历的精神病患者。通过使用两条规则（Sc大于70；Sc大于PT）对这些资料进行盲法分类。除了低学历黑人外，所有患者的分类正确率均高于随机水平。几乎一半的低学历黑人非精神分裂症患者被误诊为精神分裂症。文中讨论了该结果对诊断工作的启示。
