TY - BOOK
T1 - Optimal stratification of item pools in α-stratified computerized adaptive testing
AU - van der Linden, Willem J.
PY - 2000
Y1 - 2000
N2 - A method based on 0-1 linear programming (LP) is presented to stratify an item pool optimally for use in a-stratified adaptive testing. Because the 0-1 LP model belongs to the subclass of models with a network-flow structure, efficient solutions are possible. The method is applied to a previous item pool from the CAT version of the GRE Quantitative Test. The results indicate that the new method performs well in practical situations. It improves item exposure control, reduces the MSE in the 0 estimates, and increases test reliability.
AB - A method based on 0-1 linear programming (LP) is presented to stratify an item pool optimally for use in a-stratified adaptive testing. Because the 0-1 LP model belongs to the subclass of models with a network-flow structure, efficient solutions are possible. The method is applied to a previous item pool from the CAT version of the GRE Quantitative Test. The results indicate that the new method performs well in practical situations. It improves item exposure control, reduces the MSE in the 0 estimates, and increases test reliability.
KW - Item poolstratification
KW - Computerized adaptive testing (CAT)
KW - A-stratified adaptive testing
KW - 0-1 Linear programming
M3 - Report
T3 - OMD research report
BT - Optimal stratification of item pools in α-stratified computerized adaptive testing
PB - University of Twente
CY - Enschede
ER -