Homogeneity of Test Validity

In the present investigation we examined the extent to which the validity of three cognitive ability tests varied across test score range with respect to predicting job performance. This study was a partial replication and extension of Lee and Foley (1986). The 24,219 participants in the current study were obtained from the General Aptitude Test Battery (GATB) data base. Measures included in the analyses were general cognitive ability, numerical ability, and verbal ability. Results did not confirm Lee and Foley's findings. Specifically, the validity of the tests used in this study did not appreciably vary at different points along the test score range.