GROUP HOMOGENEITY, RANGE RESTRICTION, AND RANGE ENHANCEMENT EFFECTS ON CORRELATIONS
研究了范围增强效应对相关性的影响，指出在效度泛化中修正范围限制可能受到质疑，并分析了样本增减与个体差异变化对相关性的不同作用。
Recently, the issue of range enhancement effects on correlations has been raised as a potential criticism of correction for range restriction in validity generalization. While adding to or deleting from a sample can affect both the variance and correlation in the sample, increases or decreases in individual differences in an intact sample resulting from such factors as history, maturation, training, and experience will not necessarily affect correlations. If such changes in individual differences do occur in concurrent validation studies, the most likely result will be an underestimate of the unrestricted validity.