Some examinees' test-taking behavior may be so idiosyncratic that their test scores are not comparable to those of more typical examinees. A new theoretical approach to appropriateness measurement is proposed that specifies a likelihood ratio test and an efficient computer algorithm for computing the test statistic. (TJH)

A probabilistic item response theory (IRT) model is developed for pair-comparison design in which the unfolding principle governing the choice process uses a discriminant process analogous to Thurstone's Law of Comparative Judgment. A simulation study demonstrates the feasibility of estimation, and two examples illustrate the implications for…

A project was undertaken to carry out experimental and methodological investigations on learning phenomena and psychometric methods relevant to instructional technology and computer-assisted instruction. The project's accomplishments are presented in this report, along with a listing of reports and products produced. The work of the project is…