Hmm, Cricket2, I understood this differently. My D15 has been diagnosed with a non-verbal learning disability, and the diagnosis is based partially on large discrepancies between some of the verbal and non-verbal subtests on the WISC-IV. I am not at home and don't have the details in front of me, but my understanding from the psychiatrist who administered and interpreted the results for us was that in that particular case, the discrepancy in scores is a strong indicator of that type of learning disability.