Acceptable performance on the Medical College Admissions Test (MCAT) is necessary for acceptance into medical school; therefore, students planning a career in medicine and their advisors would benefit by having information useful in predicting performance on this examination. The present study examined the validity of the ACT Assessment as such a…

This paper reviews the existing multidimensional item response theory (IRT) models and demonstrates how one of the models can be applied to estimation of abilities from a test measuring more than one dimension. The purposes of this paper were threefold. First, the fundamental concepts required when considering multidimensional models for the…

One of the important underlying assumptions of all item response theory (IRT) models is that of local independence. This assumption requires that the response to an item on a test not be influenced by the response to any other items. This assumption is often taken for granted, with little or no scrutiny of the response process required to answer…

This study was conducted to relate personal, cognitive, and school variables to physics achievement. The sample consisted of 435 students participating in the 1985 Mississippi State University Annual Physics Competition. The Student Background Questionnaire was planned and developed to collect information on each variable examined. The predictor…