Comparative Racial Analysis of Enlisted Advancement Exams: Relative Item-Difficulty Between Performance-Matched Groups.
Final rept. Aug 74-Dec 75,
NAVY PERSONNEL RESEARCH AND DEVELOPMENT CENTER SAN DIEGO CALIF
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The relationship between item-difficulty of racial groups was measured by the Rho value--a correlation between the two rank-orders of the Black and White item-difficulty levels. The notion of test bias in the Rho value is that, if the test is measuring the same type of ability in two groups, the same items should be relatively the easiest and most difficult for both groups--this should hold even though substantial differences may exist between two groups in total test scores or in percentage answering an item correctly. Since other studies have found that relative item-difficulty is a function of test-taking ability, this study compared item-response relationships between Black and White groups matched on test score.
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