TY - CONF T1 - Item exposure in adaptive tests: An empirical investigation of control strategies T2 - Paper presented at the annual meeting of the Psychometric Society Y1 - 1999 A1 - Parshall, C. A1 - Hogarty, K. A1 - Kromrey, J. JF - Paper presented at the annual meeting of the Psychometric Society CY - Lawrence KS ER -