TY - CONF T1 - Implementing an alternative to Sympson-Hetter item-exposure control in constrained adaptive testing T2 - Paper presented at the Annual meeting of the National Council on Measurement in Education Y1 - 2003 A1 - Veldkamp, B. P. A1 - van der Linden, W. J. JF - Paper presented at the Annual meeting of the National Council on Measurement in Education CY - Chicago IL ER -