Testing in educational system perform a number of functions, the results from a test can be used to make a number of decisions in education. It is therefore well accepted in the education literature that, testing is an important element of education. To effectively utilize the tests in educational policies and quality assurance its validity and…

The (univariate) isotonic psychometric (ISOP) model (Scheiblechner, 1995) is a nonparametric IRT model for dichotomous and polytomous (rating scale) psychological test data. A weak subject independence axiom W1 postulates that the subjects are ordered in the same way except for ties (i.e., similarly or isotonically) by all items of a psychological…

Using item response theory, discusses the difficulties faced in evaluating measurement invariance when a psychological construct is assessed through a test or inventory composed of categorical items. Illustrates the usefulness of fitplots in assessing measurement invariance in inventory data. (SLD)

Describes a project used in a sophomore-level psychological testing and measurement course. Students worked through the different phases of developing a test focused on item writing, reliability, and validity. Responses from both students and instructors have been consistently positive. (MJP)

Presents an overview of the major contemporary reference sources (print, online, and electronic) for scholarly information about psychological/educational tests. Stresses books and compendia that will assist reference librarians, and includes a compilation of texts that provide actual test items. Contains 53 references. (Author/LRW)

In this article, I describe a practical application of the Roussos and Stout (1996) multidimensional analysis framework for interpreting group performance differences on an ESL reading proficiency test. Although a variety of statistical methods have been developed for flagging test items that function differentially for equal ability examinees…