%0 Journal Article %J Applied Measurement in Education %D 2001 %T An examination of conditioning variables used in computer adaptive testing for DIF analyses %A Walker, C. M. %A Beretvas, S. N %A Ackerman, T. A. %B Applied Measurement in Education %V 14 %P 3-16 %0 Conference Paper %B Paper presented at the annual meeting of the National Council on Measurement in Education %D 1999 %T An examination of conditioning variables in DIF analysis in a computer adaptive testing environment %A Walker, C. M. %A Ackerman, T. A. %B Paper presented at the annual meeting of the National Council on Measurement in Education %C Montreal, Canada %G eng %0 Journal Article %J Applied Psychological Measurement %D 1991 %T The Use of Unidimensional Parameter Estimates of Multidimensional Items in Adaptive Testing %A Ackerman, T. A. %B Applied Psychological Measurement %V 15 %P 13-24 %G English %N 1 %0 Journal Article %J Applied Psychological Measurement %D 1991 %T The use of unidimensional parameter estimates of multidimensional items in adaptive testing %A Ackerman, T. A. %B Applied Psychological Measurement %V 15 %P 13-24 %G eng %0 Report %D 1987 %T The use of unidimensional item parameter estimates of multidimensional items in adaptive testing %A Ackerman, T. A. %X Investigated the effect of using multidimensional (MDN) items in a computer adaptive test setting that assumes a unidimensional item response theory model in 2 experiments, using generated and real data in which difficulty was known to be confounded with dimensionality. Results from simulations suggest that univariate calibration of MDN data filtered out multidimensionality. The closer an item's MDN composite aligned itself with the calibrated univariate ability scale's orientation, the larger was the estimated discrimination parameter. (PsycINFO Database Record (c) 2003 APA, all rights reserved). %B ACT Research Reports %I ACT %C Iowa City, IA %P 33 %8 September, 1987 %@ 87-13 %G eng