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Abstract
This study examined the validity of a parallel form of the Primary Mental Abilities test for use with adults aged 50 to 90 years. Significant intraindividual performance gains on the parallel form were observed on the Verbal and Number subtests, while the effect on Space and Reasoning subtests was less substantial The development of such age‐fair measures of psychometric intelligence and related issues are discussed within the context of current developments in research on aging.