We analyzed a pool of items from an admissions test for differential item functioning (DIF) for groups based on age, socioeconomic status, citizenship, or English language status using Mantel-Haenszel and item response theory. DIF items were systematically examined to identify its possible sources by item type, content, and wording. DIF was…

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

Assessing student attainment in the major field of study is increasingly important to employers and accrediting bodies alike. Construction and manufacturing firms do not like engineers who design faulty bridges and airplanes. Marketing firms want to hire students who understand the difference between a niche market and a global market. School…