| The NART as an index of prior intellectual functioning: a retrospective validity study covering a 66-year interval. | |
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MedLine Citation:
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PMID: 11305853 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: The National Adult Reading Test (NART) is widely used in research and clinical practice as an estimate of pre-morbid or prior ability. However, most of the evidence on the NART's validity as a measure of prior intellectual ability is based on concurrent administration of the NART and an IQ measure. METHOD: We followed up 179 individuals who had taken an IQ test (the Moray House Test) at age 11 and administered the NART and the Mini-Mental State Examination (MMSE) at age 77. A subset (N = 97) were also re-administered the original IQ test. RESULTS: The correlation between NART performance at age 77 and IQ age 11 was high and statistically significant (r = 0.73; P < 0001). This correlation was comparable to the correlation between NART and current IQ, and childhood IQ and current IQ, despite the shared influences on the latter variable pairings. The NART had a significant correlation with the MMSE but this correlation fell to near zero (r = 0.02) after partialling out the influence of childhood IQ. DISCUSSION: The pattern of results provides strong support for the claim that the NART primarily indexes prior (rather than current) intellectual ability. |
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Authors:
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J R Crawford; I J Deary; J Starr; L J Whalley |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Psychological medicine Volume: 31 ISSN: 0033-2917 ISO Abbreviation: Psychol Med Publication Date: 2001 Apr |
Date Detail:
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Created Date: 2001-04-17 Completed Date: 2001-09-27 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 1254142 Medline TA: Psychol Med Country: England |
Other Details:
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Languages: eng Pagination: 451-8 Citation Subset: IM |
Affiliation:
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Department of Psychology, King's College, University of Aberdeen. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Cognition Disorders / diagnosis, epidemiology Humans Intelligence* Intelligence Tests* Neuropsychological Tests Psychometrics / statistics & numerical data Reading* Retrospective Studies |
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