Biased tests systematically favor some groups over others as a result of factors not part of what the test is said to measure. Bias is basically a problem of differential validity. Validity can be discussed in terms of either the procedures for establishing it or test use. Both ways clarify bias in any test. For content and construct validity, the…

This paper is concerned with the accusations made by such groups as the Association of Black Psychologists in their call for a moratorium on testing, that standardized tests are biased. A biased test measures one trait in one group of people but a different trait in a second group. Evidence about the amount of bias in tests is thin. Bias must be…