A method to measure speededness on tests is presented that reflects the tendency of examinees to guess rapidly on items as time expires. The method models response times with a two-state mixture model, as demonstrated with data from a computer-administered reasoning test taken by 7,218 examinees. (SLD)

Analyzed examinee responses to conventional (multiple-choice) and innovative item formats in a computer-based testing program for item response theory (IRT) information with the three parameter and graded response models. Results for more than 3,000 adult examines for 2 tests show that the innovative item types in this study provided more…

Efficiency, precision, and concurrent validity of results from adaptive and fixed-item music listening tests were studied using: (1) 2,200 simulated examinees; (2) 204 live examinees; and (3) 172 live examinees. Results support the usefulness of adaptive tests for measuring skills that require aurally produced items. (SLD)