(CAT) comes with many advantages. Unfortunately,
it still is quite expensive to develop and maintain an operational CAT. In this paper,
various steps involved in developing an operational CAT are described and literature
on these topics is reviewed. Bayesian CAT is introduced as an alternative, and the
use of empirical priors is proposed for estimating item and person parameters to
reduce the costs of CAT. Methods to elicit empirical priors are presented and a
two small examples are presented that illustrate the advantages of Bayesian CAT.
Implications of the use of empirical priors are discussed, limitations are mentioned
and some suggestions for further research are formulated.
Keywords: Bayesian IRT modeling. Computerized Adaptive Testing. Eliciting priors.
Item Response Theory. Item selection. Parameter estimation.