Postdicting verbal IQ of elderly individuals

Journal of Clinical and Experimental Neuropsychology
L M CarswellM C Tierney

Abstract

We undertook a longitudinal crossvalidation of the Ryan and Paolo (1992) equation's ability to postdict Wechsler Adult Intelligence Scale-Revised (WAIS-R) Verbal IQ (VIQ) from National Adult Reading Test (NART) performance measured 5 years after VIQ scores were obtained, for a sample of 49 elderly normal individuals (mean age 71 years). Five-year interval postdiction accuracy agreed very well with the results of the original, concurrent study. Clinical utility is still limited, however, as VIQ must decline by 16.3 points for 95%-detection sensitivity. A new regression equation that utilizes a combination of NART errors and WAIS-R Vocabulary age-scaled scores (measured 3 years earlier) provided slightly better expected clinical sensitivity and accounted for 49% of the variance in VIQ scores.

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Citations

Mar 19, 2005·Perceptual and Motor Skills·Francis McCarthyAlfred H Sellers
Aug 16, 2011·Schizophrenia Research·Kirstin DaalmanIris Sommer

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