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Standard of Practice and Flynn Effect Testimony in Death Penalty Cases
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Gresham, Frank M.; Reschly, Daniel J. – Intellectual and Developmental Disabilities, 2011
The Flynn Effect is a well-established psychometric fact documenting substantial increases in measured intelligence test performance over time. Flynn's (1984) review of the literature established that Americans gain approximately 0.3 points per year or 3 points per decade in measured intelligence. The accurate assessment and interpretation of…
Descriptors: Death, Punishment, Court Litigation, Intelligence Quotient
Stanford-Binet and WAIS IQ Differences and Their Implications for Adults with Intellectual Disability (aka Mental Retardation)
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Silverman, Wayne; Miezejeski, Charles; Ryan, Robert; Zigman, Warren; Krinsky-McHale, Sharon; Urv, Tiina – Intelligence, 2010
Stanford-Binet and Wechsler Adult Intelligence Scale (WAIS) IQs were compared for a group of 74 adults with intellectual disability (ID). In every case, WAIS Full Scale IQ was higher than the Stanford-Binet Composite IQ, with a mean difference of 16.7 points. These differences did not appear to be due to the lower minimum possible score for the…
Descriptors: Mental Retardation, Dementia, Intelligence Quotient, Measures (Individuals)