TY - CONF T1 - Performance of the Sympson-Hetter exposure control algorithm with a polytomous item bank T2 - Paper presented at the annual meeting of American Educational Research Association Y1 - 1999 A1 - Pastor, D. A. A1 - Chiang, C. A1 - Dodd, B. G. A1 - Yockey, R. and JF - Paper presented at the annual meeting of American Educational Research Association CY - Montreal, Canada ER -