A study investigated optimal length of screening tests used to sort out medical students needing to take a full-length performance-based standardized-patient test from those not needing it. Receiver operating characteristic analysis determined a good length is one-third the full test, with cutoff just above the mean case pass level. (Author/MSE)

This paper presents a method for estimating the accuracy and consistency of classifications based on test scores. The scores can be produced by any scoring method, including the formation of a weighted composite. The estimates use data from a single form. The reliability of the score is used to estimate its effective test length in terms of…

The clinical utility of using fewer than 12 trials of the Selective Reminding Test, a task to assess verbal memory, was studied with 100 cardiac patients and 100 brain injury patients. Results suggest that as few as 6 trials might be adequate, providing information consistent with that from 12 trials. (SLD)

Concepts of adaptive testing and the related measurement model, item response theory, are introduced and benefits and limitations are outlined. Field tests with over 2,500 students illustrate the use of adaptive tests in college placement. Some future directions for computerized adaptive testing are considered. (SLD)

Four main approaches to customized testing are described, and their resulting scores' valid uses and interpretations are discussed. Customized testing can yield valid normative and curriculum-specific information, although cautious application is needed to avoid misleading inferences about student achievement. (SLD)