Constrained Adaptive Testing

DOCUMENT RESUME TM 034 736 Veldkamp, Bernard P.; Ariel, Adelaide Extended Shadow Test Approach for Constrained Adaptive Testing. Research Report. Twente Univ., Enschede (Netherlands). Faculty of Educational Science and Technology. RR-02-07 2002-00-00 30p Faculty of Educational Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. Email: [email protected]. Reports Research (143) EDRS Price MF01/PCO2 Plus Postage. *Adaptive Testing; Computer Assisted Testing; Item Banks; *Test Construction; Test Items *Constraints Several methods have been developed for use on constrained adaptive testing. Item pool partitioning, multistage testing, and testletbased adaptive testing are methods that perform well for specific cases of adaptive testing. The weighted deviation model and the Shadow Test approach can be more generally applied. These methods are based on different ideas about how to optimize the performance of computerized adaptive testing (CAT), and they have different advantages. In this paper, both ideas are combined, and a new approach for selecting items in CAT, the Extended Shadow Test approach is presented. The performances of the Extended Shadow Test Approach, the Shadow Test approach, and the weighted deviation model are compared using simulation and existing item pools. The Extended Shadow Test approach shows accurate performance. Recommendations are given about its use. (Contains 4 tables and 22 references.) (Author/SLD) Reproductions supplied by EDRS are the best that can be made from the original document.