%0 Conference Paper %B Paper presented at the annual meeting of the American Educational Research Association %D 2001 %T An investigation of procedures for estimating error indexes in proficiency estimation in a realistic second-order equitable CAT environment %A Shyu, C.-Y. %A Fan, M. %A Thompson, T, %A Hsu. %B Paper presented at the annual meeting of the American Educational Research Association %C Seattle WA %G eng