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Severe Regressed Discrepancies Using Published versus Mean Test Data.
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Evans, Larry D. – Learning Disabilities Research and Practice, 1994
This comparison of regression discrepancy model results for learning disability identification used published IQ-achievement and reliability coefficients and generic, mean values. Use of mean IQ-achievement values resulted in higher discrepancy rates for a clinical sample. Use of both mean IQ-achievement and reliability values resulted in higher…
Descriptors: Academic Achievement, Academic Aptitude, Achievement Tests, Correlation