A Critical Analysis of the Psychometric Properties of the K-ABC

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Abstract
The K-ABC is reviewed with respect to (a) the manuals, (b) the test construction and norming procedures, (c) reliability evidence, (d) validity evidence, (e) administration and scoring procedures, (f) types of scores and interpretative guidelines, and (g) the bias issue. The psychometric properties of the test are in line with what we would hope for in a newly constructed instrument. Particularly praiseworthy features are the theoretical bases for the instrument, the completeness of the manuals, the treatment and discussion of the difference scores and profile score comparisons, and the number of validity studies that were conducted. Some of the limitations are the lack of long-term stability, reliability, and validity studies, some lack of clarity about how to use the sociocultural norms, and a lack of a definition of bias.

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