Bayesian Johnson-Neyman methodology was used to investigate differential prediction by race in U.S. Air Force training programs. Meaningful differences were found in eight of nine comparisons. The setting of the cutting scores had an effect on whether the bias was positive or negative for Blacks. (Author/GDC)

This brief, filed by Educational Testing Service (ETS), a non-profit educational corporation, deals with whether Test 21, a test of verbal ability developed by the U.S. Civil Service Commission and used by the Metropolitan Police Department of the District of Columbia to select police recruits, is sufficiently job-related to be legally permissible…

This primer is an introduction to item response theory (also called item characteristic curve theory, or latent trait theory) as it is used most commonly--for scoring multiple choice achievement or aptitude tests. Written for the testing practitioner with minimum training in statistics and psychometrics, it presents and illustrates the basic…