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From “Aisle” to “Labile”: A Hierarchical National Adult Reading Test Scale Revealed by Mokken Scaling

Decline in cognitive ability is a core diagnostic criterion for dementia. Knowing the extent of decline requires a baseline score from which change can be reckoned. In the absence of prior cognitive ability scores, vocabulary-based cognitive tests are used to estimate premorbid cognitive ability. It...

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Autores principales: McGrory, Sarah, Austin, Elizabeth J., Shenkin, Susan D., Starr, John M., Deary, Ian J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Psychological Association 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4547520/
https://www.ncbi.nlm.nih.gov/pubmed/26302224
http://dx.doi.org/10.1037/pas0000091
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author McGrory, Sarah
Austin, Elizabeth J.
Shenkin, Susan D.
Starr, John M.
Deary, Ian J.
author_facet McGrory, Sarah
Austin, Elizabeth J.
Shenkin, Susan D.
Starr, John M.
Deary, Ian J.
author_sort McGrory, Sarah
collection PubMed
description Decline in cognitive ability is a core diagnostic criterion for dementia. Knowing the extent of decline requires a baseline score from which change can be reckoned. In the absence of prior cognitive ability scores, vocabulary-based cognitive tests are used to estimate premorbid cognitive ability. It is important that such tests are short yet informative, to maximize information and practicability. The National Adult Reading Test (NART) is commonly used to estimate premorbid intelligence. People are asked to pronounce 50 words ranging from easy to difficult but whether its words conform to a hierarchy is unknown. Five hundred eighty-seven healthy community-dwelling older people with known age 11 IQ scores completed the NART as part of the Lothian Birth Cohort 1936 study. Mokken analysis was used to explore item responses for unidimensional, ordinal, and hierarchical scales. A strong hierarchical scale (“mini-NART”) of 23 of the 50 items was identified. These items are invariantly ordered across all ability levels. The validity of the interpretation of this briefer scale’s score as an estimate of premorbid ability was examined using the actual age 11 IQ score. The mini-NART accounted for a similar amount of the variance in age 11 IQ as the full NART (NART = 46.5%, mini-NART = 44.8%). The mini-NART is proposed as a useful short clinical tool to estimate prior cognitive ability. The mini-NART has clinical relevance, comprising highly discriminatory, invariantly ordered items allowing for sensitive measurement, and adaptive testing, reducing test administration time, and patient stress.
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spelling pubmed-45475202015-08-26 From “Aisle” to “Labile”: A Hierarchical National Adult Reading Test Scale Revealed by Mokken Scaling McGrory, Sarah Austin, Elizabeth J. Shenkin, Susan D. Starr, John M. Deary, Ian J. Psychol Assess Articles Decline in cognitive ability is a core diagnostic criterion for dementia. Knowing the extent of decline requires a baseline score from which change can be reckoned. In the absence of prior cognitive ability scores, vocabulary-based cognitive tests are used to estimate premorbid cognitive ability. It is important that such tests are short yet informative, to maximize information and practicability. The National Adult Reading Test (NART) is commonly used to estimate premorbid intelligence. People are asked to pronounce 50 words ranging from easy to difficult but whether its words conform to a hierarchy is unknown. Five hundred eighty-seven healthy community-dwelling older people with known age 11 IQ scores completed the NART as part of the Lothian Birth Cohort 1936 study. Mokken analysis was used to explore item responses for unidimensional, ordinal, and hierarchical scales. A strong hierarchical scale (“mini-NART”) of 23 of the 50 items was identified. These items are invariantly ordered across all ability levels. The validity of the interpretation of this briefer scale’s score as an estimate of premorbid ability was examined using the actual age 11 IQ score. The mini-NART accounted for a similar amount of the variance in age 11 IQ as the full NART (NART = 46.5%, mini-NART = 44.8%). The mini-NART is proposed as a useful short clinical tool to estimate prior cognitive ability. The mini-NART has clinical relevance, comprising highly discriminatory, invariantly ordered items allowing for sensitive measurement, and adaptive testing, reducing test administration time, and patient stress. American Psychological Association 2015-08-10 2015-09 /pmc/articles/PMC4547520/ /pubmed/26302224 http://dx.doi.org/10.1037/pas0000091 Text en © 2015 the Author(s) http://creativecommons.org/licenses/by/3.0/ This article has been published under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Copyright for this article is retained by the author(s). Author(s) grant(s) the American Psychological Association the exclusive right to publish the article and identify itself as the original publisher.
spellingShingle Articles
McGrory, Sarah
Austin, Elizabeth J.
Shenkin, Susan D.
Starr, John M.
Deary, Ian J.
From “Aisle” to “Labile”: A Hierarchical National Adult Reading Test Scale Revealed by Mokken Scaling
title From “Aisle” to “Labile”: A Hierarchical National Adult Reading Test Scale Revealed by Mokken Scaling
title_full From “Aisle” to “Labile”: A Hierarchical National Adult Reading Test Scale Revealed by Mokken Scaling
title_fullStr From “Aisle” to “Labile”: A Hierarchical National Adult Reading Test Scale Revealed by Mokken Scaling
title_full_unstemmed From “Aisle” to “Labile”: A Hierarchical National Adult Reading Test Scale Revealed by Mokken Scaling
title_short From “Aisle” to “Labile”: A Hierarchical National Adult Reading Test Scale Revealed by Mokken Scaling
title_sort from “aisle” to “labile”: a hierarchical national adult reading test scale revealed by mokken scaling
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4547520/
https://www.ncbi.nlm.nih.gov/pubmed/26302224
http://dx.doi.org/10.1037/pas0000091
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