Item selection in computerized adaptive testing: Should more discriminating items be used first?. Journal of Educational Measurement, 38, 249-266.
. (1998). Item selection in computerized adaptive testing: Improving the a-stratified design with the Sympson-Hetter algorithm. Applied Psychological Measurement, 26, 376-392.
. (2002). Computerized adaptive testing: a mixture item selection approach for constrained situations. British Journal of Mathematical and Statistical Psychology, 58, 239-57. presented at the Nov.
. (2005).