Score difference between groups has been and will continue to be of great interest to researchers and practitioners working in the field of personnel assessment and selection (Goldstein et al., 2009; Hough, Oswald & Ployhart, 2001; Ployhart & Holtz, 2008). This chapter has summarized current research on differences between racial/ethnic groups and national cultural groups on predictors frequently used in employee selection. Current literature, while limited for all group comparisons except African-Americans and Whites, indicates that there are differences which vary as both a function and feature of the predictor. At this point, there are as many answered questions as unanswered questions. Additional empirical work documenting both the work and theoretical work explaining these differences are clearly needed.
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