TitleItem Selection Criteria With Practical Constraints in Cognitive Diagnostic Computerized Adaptive Testing
Publication TypeJournal Article
Year of Publication2019
AuthorsLin, C-J, Chang, H-H
JournalEducational and Psychological Measurement
Volume79
Number2
Pagination335-357
AbstractFor item selection in cognitive diagnostic computerized adaptive testing (CD-CAT), ideally, a single item selection index should be created to simultaneously regulate precision, exposure status, and attribute balancing. For this purpose, in this study, we first proposed an attribute-balanced item selection criterion, namely, the standardized weighted deviation global discrimination index (SWDGDI), and subsequently formulated the constrained progressive index (CP\_SWDGDI) by casting the SWDGDI in a progressive algorithm. A simulation study revealed that the SWDGDI method was effective in balancing attribute coverage and the CP\_SWDGDI method was able to simultaneously balance attribute coverage and item pool usage while maintaining acceptable estimation precision. This research also demonstrates the advantage of a relatively low number of attributes in CD-CAT applications.
URLhttps://doi.org/10.1177/0013164418790634
DOI10.1177/0013164418790634