Exploration of the Raven APM - National Adult Reading Test Discrepancy as a Measure of Intellectual Decline in Older Persons

Esther van den Berg*, Gudrun M. S. Nys, Augustina M. A. Brands, Carla Ruis, Martine J. E. van Zandvoort, Roy P. C. Kessels

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Previous studies have shown that the discrepancy between performance on fluid and crystallized intelligence measures may serve as an indicator for intellectual decline. The validity of this procedure in older persons is unknown. The present study developed a multiple regression equation, to predict the Raven Advanced Progressive Matrices (APM) score from the National Adult Reading Test (NART) score and demographic variables in a large sample of healthy older persons (n=270). The discrepancy between the predicted and observed Raven APM scores was transformed into a percentile distribution as an indicator of intellectual decline, which can be used in clinical practice. The validity of the procedure was further examined by comparing the proportion of persons with a significant decline (at the 1 and 1.65 SD level) between two older patient samples (87 patients with cerebral stroke and 387 patients with diabetes mellitus) by means of (2) tests. There was a significantly higher rate of intellectual decline at the 1 SD (below average) and 1.65 SD (impaired) cutoff levels for patients with stroke compared with patients with diabetes (stroke, 34% and 14%; diabetes, 16% and 5%, p

Original languageEnglish
Pages (from-to)7-14
Number of pages8
JournalApplied neuropsychology. Adult
Volume20
Issue number1
DOIs
Publication statusPublished - 1 Jan 2013
Externally publishedYes

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