An integer programming approach to item bank design. Applied Psychological Measurement, 24, 139-150.
. (2000). Item response theory applied to combinations of multiple-choice and constructed-response items--approximation methods for scale scores. In Test scoring (pp. 289-315). Mahwah, N.J. USA: Lawrence Erlbaum Associates.
. (2001). Generating abstract reasoning items with cognitive theory. In , Item generation for test development (pp. 219-250). Mahwah, N.J. USA: Lawrence Erlbaum Associates, Inc.
. (2002). Mathematical-programming approaches to test item pool design (No. RR 02-09) (pp. 93-108). Twente, The Netherlands: University of Twente, Faculty of Educational Science and Technology.
. (2002). The relationship between item exposure and test overlap in computerized adaptive testing. Journal of Educational Measurement, 40, 129-145.
. (2003). A randomized experiment to compare conventional, computerized, and computerized adaptive administration of ordinal polytomous attitude items. Applied Psychological Measurement, 29, 159-183.
. (2005). . (2005).
Assembling a computerized adaptive testing item pool as a set of linear tests. Journal of Educational and Behavioral Statistics, 31, 81-99.
. (2006). Computerized adaptive testing for polytomous motivation items: Administration mode effects and a comparison with short forms. Applied Psychological Measurement, 31, 412-429.
. (2007).