@conference {1246, title = {Achieving accuracy of retest calibration for a national CAT placement examination with a restricted test length}, booktitle = {Paper presented at the annual meeting of the National Council on Measurement in Education}, year = {2004}, note = {$\#$WA04-01 {PDF file, 837 KB}}, address = {San Diego CA}, author = {Wang, X. B. and Wiley, A.} }