The National Adult Reading Test (NART) is a widely accepted and commonly used method in clinical settings for estimating premorbid intelligence levels of (initially) English-speaking patients with dementia in neuropsychological research and practice.
[1] Other work has suggested that NART offers greater predictive validity than using demographic data alone, or use of the best performing IQ sub-test score.
[3] The British NART was re-standardized in 1991 to enable calculation of predicted IQ on the newer WAIS-R[4] and again in 2016 to provide premorbid estimates on the most recent WAIS-IV.
The AMNART was developed independently in 1987 but unpublished until 1991 and comprises 50 words selected to be familiar to speakers of American English (for example gaoled and drachm were removed).
[13] The validity prediction limits of many of the international and abbreviated variants have been evaluated, indicating good performance for a broad range of IQ scores but with a reduced capability to accurately assess patients of very high or very low premorbid ability.