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The Prudhoe Cognitive Function Test, a scale to assess cognitive function in adults with Down's syndrome: Inter-rater and test-retest reliability

Lookup NU author(s): Dr Maria Margallo-Lana, Dr Brian Moore, Dr Stephen Tyrer, Dr Henrietta Dawson, Professor Katy Jenkins


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Background. The Prudhoe Cognitive Function Test (PCFT) was designed to measure cognitive function in subjects with all degrees of intellectual disability (ID) and to be administered by non-specialist raters. The aim of the present study was to measure the test-retest and inter-rater reliability of the PCFT. Methods. Three raters, one a specialist and two non-specialists, administered the PCFT to 14 subjects with Down's syndrome on two occasions separated by 4 weeks. Results. The intra-class correlation coefficients (ICCs) between the rater pairs (n = 3) were 0.99, 0.99 and 0.98 (P < 0.01). Floor effects were recorded for two items. The ICC for test-retest reliability was 0.99 (P < 0.01). Conclusions. The PCFT is a highly reliable instrument when used by either specialist or non-specialist raters. It has excellent temporal stability.

Publication metadata

Author(s): Margallo-Lana ML, Moore PB, Tyrer SP, Dawson H, Jenkins K, Kay DWK

Publication type: Article

Publication status: Published

Journal: Journal of Intellectual Disability Research

Year: 2003

Volume: 47

Issue: 6

Pages: 488-492

Print publication date: 01/09/2003

ISSN (print): 0964-2633

ISSN (electronic): 1365-2788

Publisher: Wiley-Blackwell Publishing


DOI: 10.1046/j.1365-2788.2003.00450.x

PubMed id: 12919200


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