Orlando and Thissen (2000, 2003) proposed an item-fit index, S-X[superscript 2], for dichotomous item response theory (IRT) models, which has performed better than traditional item-fit statistics such as Yen's (1981) Q[subscript 1] and McKinley and Mill's (1985) G[superscript 2]. This study extends the utility of S-X[superscript 2] to polytomous…

This glossary of terms used in educational and psychological measurement is geared toward the non-specialist in measurement. Terms which are considered basic are defined, such as those used in test manuals or educational journals. Definitions are based on current usage in textbooks in the areas of educational and psychological measurement and…

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,…

The difficulties in comparing profile variability (a measure of test scatter) are briefly discussed and the limitations of current techniques pointed out. Test scatter is defined as individual variation in test scores between or within various psychological and educational tests. Currently, no statistical technique for the comparison of profile…

This review employs a conceptual framework that distinguishes methods of detecting measurement bias based on either observed or unobserved conditional invariance models. The primary interest is in group-level measurement bias. Methods for bias detection in both continuous and ordered-categorical measures are reviewed, as are methods for testlets…

The International Language Testing Association has some 250 members in 15 countries. Most are specialists in the testing of second language skills, with a special interest in performance assessment because of the testing of speaking and writing performance that is critical to second language skills assessment. The association believes that certain…

Textbooks that have been and are being used by students in education and psychology to learn about statistical testing are reviewed. Twenty-eight textbooks published prior to 1950 were reviewed. These textbooks were found to focus on descriptive methods, to concentrate on educational testing, and to present limited formal statistical formulation.…

The bibliography presented in this bulletin purports to cover the printed material issued in this country concerning intelligence and educational tests during the period from January 1, 1918 to June 30, 1922. It has been the purpose of the compilers to make the bibliography as useful to students and to practical school people as possible. To that…