@conference {1160, title = {An investigation of procedures for estimating error indexes in proficiency estimation in CAT}, booktitle = {Paper presented at the annual meeting of the American Educational Research Association}, year = {2002}, address = {New Orleans LA}, author = {Shyu, C.-Y. and Fan, M. and Thompson, T, and Hsu, Y.} } @conference {1159, title = {An investigation of procedures for estimating error indexes in proficiency estimation in a realistic second-order equitable CAT environment}, booktitle = {Paper presented at the annual meeting of the American Educational Research Association}, year = {2001}, address = {Seattle WA}, author = {Shyu, C.-Y. and Fan, M. and Thompson, T, and Hsu.} }