01147nas a2200133   4500008004100000020001000041245010100051210006900152260004000221300000700261520060900268100001800877856011800895       1987                        eng d  a87-1300aThe use of unidimensional item parameter estimates of multidimensional items in adaptive testing0 ause of unidimensional item parameter estimates of multidimension  aIowa City, IAbACTcSeptember, 1987  a333 aInvestigated 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).1 aAckerman, T A  uhttp://mail.iacat.org/content/use-unidimensional-item-parameter-estimates-multidimensional-items-adaptive-testing