Dr. Hessler's article was submitted as a letter to the editor in response to Cecil Reynolds' recent article, “Measuring the Aptitude-Achievement Discrepancy in Learning Disability Diagnosis” (RASE 6:5, pp. 37–48). Specifically, Dr. Hessler is concerned with which of the many available intelligence quotients is the appropriate IQ to use in severe discrepancy calculations. Although he believes that the choice of IQ should be made on a case-by-case basis, he asserts that in the vast majority of cases the chosen IQ should be the one with the strongest demonstrated correlation to achievement, that is, the score that is the best predictor of achievement. Our comments will follow Dr. Hessler's response.
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