TY - CONF T1 - An enhanced stratified computerized adaptive testing design T2 - Paper presented at the annual meeting of the American Educational Research Association Y1 - 1999 A1 - Leung, C-K.. A1 - Chang, Hua-Hua A1 - Hau, K-T. JF - Paper presented at the annual meeting of the American Educational Research Association CY - Montreal, Canada N1 - {PDF file, 478 KB} ER -