The Mantel-Haenszel (MH) procedure attempts to identify and quantify differential item performance (item bias). This paper summarizes the MH statistics, and identifies the parameters they estimate. An equivalent procedure based on the Rasch model is described. The theoretical properties of the two approaches are compared and shown to require the…

Techniques derived from item response theory are useful for estimating the reliability of test classification above and below the cutting score. Test developers can construct a test whose information is peaked in the region of the cutting score; users can select a test which provides the most information in this region. The Cut-Score…

An item discriminability study of the Iowa Tests of Basic Skills Language Skills tests identified test items that are robust discriminators, psychometrically capable of separating low scorers from higher scorers in the language tests battery. The analysis was conducted by calculating a point-biserial correlation for each item on the four language…

A study was undertaken to provide a factor analysis of the Omega Scale, a 25-item, Likert-type scale developed in 1984 to assess attitudes toward death and funerals and other body disposition practices. The Omega Scale was administered to 250 students enrolled in introductory psychology classes at two higher education institutions in Alabama.…

This research investigated the effect on estimated lower asymptotes of the instructions to Graduate Record Examination (GRE) examinees about how the test would be scored. This effect was assessed for four different verbal item types (analogies, antonyms, sentence completion, and reading comprehension) using a two-way, unweighted means analysis of…

The definition of differential item performance (DIP), often referred to as item bias, is discussed. DIP is suggested as a comprehensive term to encompass item bias (item invalidity which is unfair to certain population subgroups) and instructional bias (a valid reflection of group differences in instruction or background). This study investigated…

The purpose of this paper is to further the cause of clarifying construct interpretations of tests, by proposing that non-metric multidimensional scaling may be more useful than factor analysis or other latent structure models for investigating the internal structure of tests. It also suggests that typical problems associated with scaling…

An investigation of the effect on the difficulty value of an item due to position placement within a test was made. Using a 60-item operational test comprised of 5 subtests, 60 items were placed as experimental items on a number of spiralled test forms in three different positions (first, middle, last) within the subtest composed of like items.…

Large-sample item response data for the 10-item Paper Folding worksample 622 (N=2,749) and for five new experimental paper folding items (N=2,514) are analyzed with the logistic item response model and with full-information item factor analysis. The main results of the unidimensional analysis are that: (1) item discrimination is heterogeneous, so…

This report on the development of the Charleston County School District (South Carolina) U.S. History Area Examination outlines: (1) the preliminary planning activities to initiate the development of the test; (2) the development of test blueprints and test specifications; (3) the review of specifications for clarity, completeness, accuracy, and…

The effects of variations in degree of range restriction and different subgroup sample sizes on the validity of several item bias detection procedures based on Item Response Theory (IRT) were investigated in a simulation study. The degree of range restriction for each of two subpopulations was varied by cutting the specified subpopulation ability…

A class of multidimensional latent trait models is described. The properties of the model parameters, and initial results on the accuracy of a maximum likelihood procedure for estimating the model parameters are discussed. The model presented is a special case of the general model described by Rasch (1961), with close similarities to the models…

Guidelines for the construction and use of an attitude instrument are presented, and the application of the instrument to measure student attitude toward economics is described. Attention is directed to the Likert-like summated forced-choice variety of attitude instrument, whereby attitude toward the object is inferred from the summed responses to…

An investigation which develops a method for the automatic collection of meaningful statistical information about the causes of program resubmittal in a batch-processing environment. (Author)

The Mat-Sea-Cal Oral Proficiency Tests are a series of comparable grammatical structure tests. They have been developed in six languages: English, Spanish, Cantonese, Mandarin, Ilokano and Tagalog. Their purpose is to identify linguistic skills and deficiencies of primary school children grades K through 4. This research reported on the…