Does Spearman’s Law of Diminishing Returns differ by race/ethnicity or by sex?

The purpose of this study is to determine whether Spearman’s Law of Diminishing Returns (SLODR) operates differentially by race and by sex. In its simplest terms, SLODR is the assertion that a general intelligence factor (g) is a less meaningful determinant of cognitive ability at higher levels of ability. Using the standardization data from the Differential Ability Scales, Second Edition (DAS-II), separate multigroup bifactor models (by race and by sex) will be created in which loadings and squared loadings from g to subtests will be estimated.