. (2001). a-stratified computerized adaptive testing with unequal item exposure across strata. In Paper presented at the annual meeting of the American Educational Research Association. Seattle WA.
. (2003). To stratify or not: An investigation of CAT item selection procedures under practical constraints. In Paper presented at the Annual meeting of the National Council on Measurement in Education. Chicago IL.
de03-01.pdf (185.22 KB). (2010). Stratified and maximum information item selection procedures in computer adaptive testing. Journal of Educational Measurement, 47, 202-226.