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Direct linkWalker, Cindy M.; Azen, Razia; Schmitt, Thomas – Educational and Psychological Measurement, 2006
It is believed by some that most tests are multidimensional, meaning that they measure more than one underlying construct. The primary objective of this study is to illustrate how variations in the secondary ability distribution affect the statistical detection of dimensionality and to demonstrate the difference between substantive and statistical…
Descriptors: Multidimensional Scaling, Item Response Theory, Comparative Testing, Statistical Analysis
