The misconception of the regression-based discrepancy operationalization in the definition and research of learning disabilities |
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Authors: | Van den Broeck Wim |
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Institution: | Department of Social Sciences, University of Leiden, The Netherlands. broeck@fsw.leidenuniv.nl |
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Abstract: | In this article, I argue that the regression-based discrepancy method used in the diagnosis of learning disabilities is invalid because it is inconsistent with the underlying underachievement concept of which it is intended to be the operationalization. I mathematically demonstrate that the regression-based discrepancy method largely reflects achievement-specific determinants, thereby defeating its own object of describing aptitude-achievement discrepancies. The implications for research examining the role of intelligence in learning disabilities are outlined. |
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