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Measurement Accuracy: An Application of Multidimensional Item Response Theory to the Woodcock-Johnson Psycho-Educational Battery-Revised Achievement Scales.

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Davison, Mark L.; Chang, Yu-Wen – 1992

A two-dimensional, compensatory item response model and a unidimensional model were fitted to the reading and mathematics items in the Woodcock-Johnson Psycho-Educational Battery-Revised for a sample of 1,000 adults aged 20-39 years. Multidimensional information theory predicts that if the unidimensional abilities can be represented as vectors in…

Descriptors: Achievement Tests, Adults, Equations (Mathematics), Error of Measurement