Time limits on some computer-adaptive tests (CATs) are such that many examinees have difficulty finishing, and some examinees may be administered tests with more time-consuming items than others. Results from over 100,000 examinees suggested that about half of the examinees must guess on the final six questions of the analytical section of the…

This paper examines the history of approaches to diagnosis in education and in medicine--a profession with concentrated attention to the conceptual and mathematical underpinnings of diagnosis. Presented is a comprehensive model of diagnostic testing in education and a summary of the results of four studies, one from each of four separate…

Three test administration procedures for making placement decisions in adult education were compared (paper-based, computer-based, and computerized-adaptive tests) with 90 adult-education students. Test performance was not differentially affected by the mode of administration, but the computerized adaptive test always yielded more precise ability…

Previous studies have shown that, when administered a self-adapted test, a few examinees will choose item difficulty levels that are not well-matched to their proficiencies, resulting in high standard errors of proficiency estimation. This study investigated whether the previously observed effects of a self-adapted test--lower anxiety and higher…

Undergraduate students were administered one of three conventional or one of three stratified adaptive vocabulary tests with or without knowledge of results. Results indicated that knowledge of results and test difficulty affected performance. (Author/JKS)