ESTIMATION OF THE ADVERSE IMPACT OF A POLICE PROMOTION EXAMINATION
研究1978年美国公园警察中士晋升考试，发现笔试和面试成绩在黑白人之间无显著差异，但年龄与笔试成绩负相关，且最终晋升者均为白人。
Sixty‐five male sergeants in the U.S. Park Police, Department of Interior, competed for promotion to lieutenant in the fall of 1978. Candidates were rank‐ordered based on a weighted sum of a written job knowledge test score and an oral interview fitness and merit ranking. Five promotions would be made based upon the rank order; the top nine candidates were white. However, there was no difference in mean scores on either the test or the interview score between the group of 52 whites and the group of 12 blacks. There was also a negative relationship between age of candidate and score on written test.