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A Comparison of Two Procedures for Constrained Adaptive Test Construction CAT ATA IRT

Robin, Frederic; van der Linden, Wim J.; Eignor, Daniel R.; Steffen, Manfred; Stocking, Martha L.
Publication Year:
Report Number:
ETS Research Report
Document Type:
Page Count:
Subject/Key Words:
Computerized Adaptive Testing (CAT), Automated Test Assembly (ATA), Test Security, Item Exposure, Item Response Theory (IRT), Test Construction, Shadow Test Assembly


The paper provides a review of the rationale that led to the specific testing objectives employed, an outline of the test construction steps common to the two procedures investigated, and a description of the specific models and algorithms employed by both procedures. Detailed description of the simulation study conducted and the results obtained from both of the procedures for one of the pools are also provided. Results are summarized and further research needs in particular areas discussed.

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