@conference {835,
	title = {Data sparseness and online pretest calibration/scaling methods in CAT},
	booktitle = {Paper presented at the annual meeting of the American Educational Research Association},
	year = {2001},
	note = {Also ACT Research Report 2002-1)},
	address = {Seattle},
	author = {Ban, J and Hanson, B. A. and Yi, Q. and Harris, D.}
}
