1. Adams, R., Wilson, M., & Wang, W.-C. (1997). The multidimensional random coefficients multinomial logit model. Applied Psychological Measurement, 21, 1–23.
2. Baker, F. B., & Kim, S. H. (2004). Item response theory: Parameter estimation techniques $$(2^{{\rm nd}}$$ ( 2 nd Edition). New York: Dekker.
3. Ban, J.-C., Hanson, B. H., Wang, T. Y., Yi, Q., & Harris, D. J. (2001). A comparative study of on—line pretest item-calibration/scaling methods in computerized adaptive testing. Journal of Educational Measurement., 38, 191–212.
4. Ban, J.-C, Hanson, B. H., Yi, Q., & Harris, D. J. (2002). Data sparseness and online pretest item calibration/scaling methods in CAT (ACT Research Report 02-01). Iowa City, IA, ACT, Inc. Available at http://www.eric.ed.gov/ERICDocs/data/ericdocs2sql/content_storage_01/0000019b/80/19/da/e9.pdf
5. Birnbaum, A. (1968). Some latent trait models and their use in inferring an examinee’s ability. In F. M. Lord & M. R., Novick (Eds.), Statistical theories of mental test scores (pp. 379–479). Reading, MA: Addison-Welsey.