TY - CONF T1 - An investigation of procedures for estimating error indexes in proficiency estimation in a realistic second-order equitable CAT environment T2 - Paper presented at the annual meeting of the American Educational Research Association Y1 - 2001 A1 - Shyu, C.-Y. A1 - Fan, M. A1 - Thompson, T, A1 - Hsu. JF - Paper presented at the annual meeting of the American Educational Research Association CY - Seattle WA ER -