Estimation of trait level in computerized adaptive testing. Applied Psychological Measurement, 24, 257-265.
. (2000). A comparison of item selection techniques and exposure control mechanisms in CATs using the generalized partial credit model. Applied Psychological Measurement, 26, 147-163.
. (2002). Computerized adaptive testing using the nearest-neighbors criterion. Applied Psychological Measurement, 27, 204-216.
. (2003). The relationship between item exposure and test overlap in computerized adaptive testing. Journal of Educational Measurement, 40, 129-145.
. (2003).