Predicting premorbid IQ: A revision of the national adult reading test

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Abstract
The National Adult Reading Test (NART) has promise as an assessment tool for the determination of premorbid intellectual function, but needs to be modified for current use in a North American population and validated against the WAIS-R. A revision based on American and Canadian pronunciation rules was prepared. Sixty-six unimpaired subjects were tested with a revised NART and all subtests of the WAIS-R. Demographic variables were also recorded. Correlations between actual VIQ, PIQ and FSIQ, and predicted IQs on the basis of revised NART score were .83, .40, and .75, respectively (all p < .001). Prediction of IQs was more accurate with equations based on revised NART score than with demographic variable prediction equations developed by Barona, Reynolds, and Chastain (1984).

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