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Abstract

This study investigated the hypothesis that developmental dyscalculia is part of the behavioural phenotype of Down syndrome. One hundred and fifty-one individuals with Down syndrome across three age groups contributed data. These age groups were:6–8 years (n = 41); 13–15 years (n = 70); and 20–22 years (n = 40). Data were collected using the Stanford-Binet (Fourth Edition) and age equivalent scores on the Pattern Analysis and Quantitative subscales were used in the analyses. A repeated measure ANOVA showed a significant difference between performances on the two subtests with an interaction with age group. While performance on Pattern Analysis was better than on Quantitative for all groups the difference was most marked for the oldest group. Approximately 66% of the participants had a higher age equivalent score on the Pattern Analysis subscale than on the Quantitative subscale. It appears to be plausible that developmental dyscalculia contributesto the behavioural phenotype of Down syndrome and further investigation of this proposition is warranted.

Item Type:	Article
Authors/Creators:	Cuskelly, M and Faragher, R
Keywords:	down syndrome, dyscalculia
Journal or Publication Title:	International Journal of Disability, Development and Education
Publisher:	Routledge
ISSN:	1034-912X
DOI / ID Number:	https://doi.org/10.1080/1034912X.2019.1569209
Copyright Information:	Copyright 2019 Informa UK Limited, trading as Taylor & Francis Group
Related URLs:	Google Scholar: Cuskelly, M UTAS Profile: Cuskelly, M
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