A portion of the standardization data for the Detroit Tests of Learning Aptitude (DTLA-2) was analyzed to investigate various psychometric properties of the discrepancies between composite quotients. Information is provided on the reliabilities of the discrepancies, the discrepancies required for significance, the discrepancies obtained by various percentages of the standardization sample, and the intercorrelations of the discrepancies. The reliabilities of the discrepancies were found to be quite high (.86 to .88), and their intercorrelations acceptably low (- .62 to .49). These findings testify to the psychometric respectability of the discrepancies, but their clinical utility is as yet untested.
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