A Selection Procedure for Polytomous Items in Computerized Adaptive Testing
Door: Rijn, P.W. van, Eggen, Th.J.H.M., Hemker, B.T., Sanders, P.F. | 01-09-2000 In the present study, a procedure which was developed to select dichotomous items in computerized adaptive testing was applied to polytomous items. The aim of this procedure is to select the item with maximum weighted information.In a simulation study, the item information function was integrated over a fixed interval of ability values and the item with the maximum area was selected. This maximum interval information item selection procedure was compared to a maximum point information item selection procedure. No substantial differences between the two item selection procedures were found when computerized adaptive tests were evaluated on bias
and root mean square of the ability estimate.
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