The Mantel-Haenszel (MH) procedure is commonly used to detect items that function differentially for groups of examinees from various demographic and linguistic backgrounds--for example, in international assessments. As in some other DIF methods, the total score is used to match examinees on ability. In thin matching, each of the total score…

Describes the Dutch rating system for test quality, which evaluates a test for seven criteria, and analyses the results of test ratings from the past 18 years. Results show a steady increase in test quality in the Netherlands that can be attributed to use of better tests and declining use of tests of less quality after evaluation. (SLD)

Describes the 1997 revision of the Dutch Rating System for Test Quality used by a committee of the Dutch Association of Psychologists. The rating system evaluates test quality on seven criteria using a checklist for each criterion. Comment sections provide additional information, and weighting rules establish the final grades. (SLD)

This article focuses on Louis Guttman's contributions to the classical theory of educational and psychological tests, one of the lesser known of his many contributions to quantitative methods in the social sciences. Guttman's work in this field provided a rigorous mathematical basis for ideas that, for many decades after Spearman's initial work,…