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Data sparseness and on-line pretest item calibration-scaling methods in CAT. Journal of Educational Measurement, 39, 207-218.
. (2002). Effects of test administration mode on item parameter estimates. In Paper presented at the annual meeting of the National Council on Measurement in Education. Chicago IL.
. (2003). yi03-02.pdf (232.48 KB)Impact of scoring options for not reached items in CAT. In Paper presented at the annual meeting of the National Council on Measurement in Education. Seattle WA.
. (2001). yi01-01.pdf (231.72 KB)