ERIC Number: ED481158
Record Type: Non-Journal
Publication Date: 2003-Sep
Reference Count: N/A
Using Response-Time Constraints in Item Selection To Control for Differential Speededness in Computerized Adaptive Testing. LSAC Research Report Series.
van der Linden, Wim J.; Scrams, David J.; Schnipke, Deborah L.
This paper proposes an item selection algorithm that can be used to neutralize the effect of time limits in computer adaptive testing. The method is based on a statistical model for the response-time distributions of the test takers on the 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 model for constrained adaptive testing that maximizes the accuracy of the ability estimator. The method is demonstrated empirically using an item pool from an operational, large-scale computer adaptive test. (Contains 4 figures and 14 references.) (Author/SLD)
Publication Type: Reports - Descriptive
Education Level: N/A
Authoring Institution: Law School Admission Council, Newtown, PA.