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Direct linkFletcher, Jack M.; Stuebing, Karla K.; Hughes, Lisa C. – Journal of Psychoeducational Assessment, 2010
IQ test scores should be corrected for high stakes decisions that employ these assessments, including capital offense cases. If scores are not corrected, then diagnostic standards must change with each generation. Arguments against corrections, based on standards of practice, information present and absent in test manuals, and related issues,…
Descriptors: Testing, Mental Retardation, Validity, Intelligence Quotient
Whitaker, Simon – Intellectual and Developmental Disabilities, 2008
A meta-analysis of the stability of low IQ (IQ less than 80) was performed on IQ tests that have been commonly used--tests that were derived by D. Wechsler (1949, 1955, 1974, 1981, 1991, 1997) and those based on the Binet scales (L. M. Terman, 1960; L. M. Terman & Merrill, 1972). Weighted-mean stability coefficients of 0.77 and 0.78 were found…
Descriptors: Intelligence Tests, Intelligence Quotient, Evaluation Methods, Test Validity
