A Principal Components Analysis of the Kaufman Assessment Battery for Children (K-ABC): Implications for the Test Results of Children with Learning Disabilities

Abstract

A learning disability index (LDI) for the assessment of intellectual deficits on the K-ABC is described. The Factor II score coefficients derived from an unrotated principal components analysis of the K-ABC normative data, in combination with the individual's scaled scores, are used for this purpose. The population parameters of this index then allow for the assessment of the abnormality of the LDI in the individual case, as well as for the evaluation of the statistical significance of any change in the LDI from test to retest.

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