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Article: Defective Number Sense or Impaired Access? Differential Impairments in Different Subgroups of Children With Mathematics Difficulties

TitleDefective Number Sense or Impaired Access? Differential Impairments in Different Subgroups of Children With Mathematics Difficulties
Authors
Keywordsmathematics
dyscalculia
Issue Date2017
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/BLD
Citation
British Journal of Learning Disabilities, 2017, v. 50 n. 1, p. 49-61 How to Cite?
Abstract© 2015, © Hammill Institute on Disabilities 2015. Developmental dyscalculia (DD) is a specific learning disability in mathematics that affects around 6% of the population. Currently, the core deficit of DD remains unknown. While the number sense deficit hypothesis suggests that the core deficit of DD lies in the inability to represent nonsymbolic numerosity, the access deficit hypothesis suggests that the origin of this disability lies in the inability to associate numbers with the underlying magnitude representation. The present study compared the performance of DDs with their low-achieving (LA) and normally achieving peers in nonsymbolic numerosity processing and number-magnitude mapping over 1 year (from kindergarten to 1st grade). The results demonstrated differential impairments in different subgroups of children with mathematics difficulties. While DDs showed deficits in both nonsymbolic numerosity processing and number-magnitude mapping, LAs showed deficit only in the number-magnitude mapping. Furthermore, the deficit in number-magnitude mapping among the DD group was partially explained by their number sense deficit. The number sense deficit hypothesis is supported. Theoretical and practical implications are discussed.
Persistent Identifierhttp://hdl.handle.net/10722/215605
ISSN
2023 Impact Factor: 1.2
2023 SCImago Journal Rankings: 0.404
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWong, TY-
dc.contributor.authorHo, CSH-
dc.contributor.authorTang, J-
dc.date.accessioned2015-08-21T13:32:17Z-
dc.date.available2015-08-21T13:32:17Z-
dc.date.issued2017-
dc.identifier.citationBritish Journal of Learning Disabilities, 2017, v. 50 n. 1, p. 49-61-
dc.identifier.issn1354-4187-
dc.identifier.urihttp://hdl.handle.net/10722/215605-
dc.description.abstract© 2015, © Hammill Institute on Disabilities 2015. Developmental dyscalculia (DD) is a specific learning disability in mathematics that affects around 6% of the population. Currently, the core deficit of DD remains unknown. While the number sense deficit hypothesis suggests that the core deficit of DD lies in the inability to represent nonsymbolic numerosity, the access deficit hypothesis suggests that the origin of this disability lies in the inability to associate numbers with the underlying magnitude representation. The present study compared the performance of DDs with their low-achieving (LA) and normally achieving peers in nonsymbolic numerosity processing and number-magnitude mapping over 1 year (from kindergarten to 1st grade). The results demonstrated differential impairments in different subgroups of children with mathematics difficulties. While DDs showed deficits in both nonsymbolic numerosity processing and number-magnitude mapping, LAs showed deficit only in the number-magnitude mapping. Furthermore, the deficit in number-magnitude mapping among the DD group was partially explained by their number sense deficit. The number sense deficit hypothesis is supported. Theoretical and practical implications are discussed.-
dc.languageeng-
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/BLD-
dc.relation.ispartofBritish Journal of Learning Disabilities-
dc.rightsThe definitive version is available at www.blackwell-synergy.com-
dc.subjectmathematics-
dc.subjectdyscalculia-
dc.titleDefective Number Sense or Impaired Access? Differential Impairments in Different Subgroups of Children With Mathematics Difficulties-
dc.typeArticle-
dc.identifier.emailWong, TY: terrytyw@hku.hk-
dc.identifier.emailHo, CSH: shhoc@hkucc.hku.hk-
dc.identifier.authorityWong, TY=rp02453-
dc.identifier.authorityHo, CSH=rp00631-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1177/0022219415588851-
dc.identifier.pmid26054725-
dc.identifier.scopuseid_2-s2.0-85006046102-
dc.identifier.hkuros248503-
dc.identifier.volume50-
dc.identifier.issue1-
dc.identifier.spage49-
dc.identifier.epage61-
dc.identifier.isiWOS:000390027300005-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl1354-4187-

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