How to Build a Cognitive Ability Test with Reduced Mean Group Differences
Mike McDaniel, PhD
Work Skills First
One can build cognitive ability tests with lower mean group differences by using items with low g saturation and by reducing the reliability of the test. Such a diminished g test predicts g-related criteria worse than a g test with higher g saturation and higher reliability. Assertions about specific item types causing reduced mean differences are likely incorrect.
Mike McDaniel works for Work Skills First, a boutique human resources consulting firm that builds employment screening tools for organizations. He is also Emeritus Professor at Virginia Commonwealth University and an Associate Editor for the journal Intelligence. He was elected as a Fellow of SIOP, APA, and APS and received his Ph.D. in industrial and organizational psychology from The George Washington University.
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