ERIC Number: ED424266
Record Type: Non-Journal
Publication Date: 1998
Reference Count: N/A
Using Response-Time Constraints in Item Selection To Control for Differential Speededness in Computerized Adaptive Testing. Research Report 98-06.
van der Linden, Wim J.; Scrams, David J.; Schnipke, Deborah L.
An item-selection algorithm to neutralize the differential effects of time limits on scores on computerized adaptive tests is proposed. The method is based on a statistical model for the response-time distributions of the examinees on items in the pool that is updated each time a new item has been administered. Predictions from the model are used as constraints in a 0-1 linear programming (LP) model for constrained adaptive testing that maximizes the accuracy of the ability estimator. The method is demonstrated empirically using an item pool from the Armed Services Vocational Aptitude Battery and the responses of 38,357 examinees. The empirical example suggests that the algorithm is able to reduce the speededness of the test for the examinees who otherwise would have suffered from the time limit. Also, the algorithm did not seem to introduce any differential effects on the statistical properties of the theta estimator. (Contains 9 figures and 14 references.) (SLD)
Descriptors: Adaptive Testing, Algorithms, Computer Assisted Testing, Foreign Countries, Linear Programming, Models, Responses, Selection, Test Items, Testing Problems, Time
Faculty of Educational Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Publication Type: Opinion Papers; Reports - Research
Education Level: N/A
Authoring Institution: Twente Univ., Enschede (Netherlands). Faculty of Educational Science and Technology.