TY - CONF T1 - Nearest neighbors, simple strata, and probabilistic parameters: An empirical comparison of methods for item exposure control in CATs T2 - Paper presented at the annual meeting of the National Council on Measurement in Education Y1 - 2001 A1 - Parshall, C. G. A1 - Kromrey, J. D. A1 - Harmes, J. C. A1 - Sentovich, C. JF - Paper presented at the annual meeting of the National Council on Measurement in Education CY - Seattle WA ER -