This comprehensive "Handbook" focuses on the most used polytomous item response theory (IRT) models. These models help us understand the interaction between examinees and test questions where the questions have various response categories. The book reviews all of the major models and includes discussions about how and where the models…

We conducted 2 studies to assess and enhance levels of graduate preparation. In Study 1, 248 undergraduates and 28 graduate students completed a new measure of graduate preparation, the Grad Prep Quiz. Results documented the psychometric utility and the predictive validity of the measure, with graduate students scoring significantly higher on this…

The psychometric characteristics of the Graduate Record Examinations General Test (GRE-GT) were studied for three handicapped groups. Experimental subjects took the GRE-GT between October 1981 and June 1984; they include: (1) 151 visually-impaired students taking large-type, extended-time administrations; (2) 188 visually-impaired students taking…

"Item models" (LaDuca, Staples, Templeton, & Holzman, 1986) are classes from which it is possible to generate/produce items that are equivalent/isomorphic to other items from the same model (e.g., Bejar, 1996; Bejar, 2002). They have the potential to produce large number of high-quality items at reduced cost. This paper introduces…