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Developmental delays in phonological recoding among children and adolescents with Down syndrome and Williams syndrome
Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. Linköping University, The Swedish Institute for Disability Research.
City University of London, England.
Open University, England.
London S Bank University, England.
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2016 (English)In: Research in Developmental Disabilities, ISSN 0891-4222, E-ISSN 1873-3379, Vol. 55, 64-76 p.Article in journal (Refereed) PublishedText
Abstract [en]

This study examined the development of phonological recoding in short-term memory (STM) span tasks among two clinical groups with contrasting STM and language profiles: those with Down syndrome (DS) and Williams syndrome (WS). Phonological recoding was assessed by comparing: (1) performance on phonologically similar and dissimilar items (phonological similarity effects, PSE); and (2) items with short and long names (word length effects, WLE). Participant groups included children and adolescents with DS (n = 29), WS (n = 25) and typical development (n = 51), all with average mental ages around 6 years. The group with WS, contrary to predictions based on their relatively strong verbal STM and language abilities, showed no evidence for phonological recoding. Those in the group with DS, with weaker verbal STM and language abilities, showed positive evidence for phonological recoding (PSE), but to a lesser degree than the typical group (who showed PSE and WLE). These findings provide new information about the memory systems of these groups of children and adolescents, and suggest that STM processes involving phonological recoding do not fit with the usual expectations of the abilities of children and adolescents with WS and DS. (c) 2016 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2016. Vol. 55, 64-76 p.
Keyword [en]
Down syndrome; Williams syndrome; Phonological recoding; Phonological similarity effect; Word length effect; Visual similarity effect; Short-term memory
National Category
Psychology (excluding Applied Psychology)
Identifiers
URN: urn:nbn:se:liu:diva-130262DOI: 10.1016/j.ridd.2016.03.012ISI: 000378455100007PubMedID: 27043367OAI: oai:DiVA.org:liu-130262DiVA: diva2:950663
Note

Funding Agencies|Swedish Research Council for Health, Working Life and Welfare [FAS 2010-0739]

Available from: 2016-08-01 Created: 2016-07-28 Last updated: 2016-09-14

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The full text will be freely available from 2018-04-04 11:46
Available from 2018-04-04 11:46

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Danielsson, HenrikRönnberg, Jerker
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Disability ResearchFaculty of Arts and SciencesThe Swedish Institute for Disability Research
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