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Non-word repetition in adolescents with specific language impairment (SLI).
MedLine Citation:
PMID:  22512512     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Abstract  Background: Non-word repetition (NWR) difficulties are common, but not universal, among children with specific language impairment (SLI). However, older children and adolescents with SLI have rarely been studied. Studies disagree on the relationship between NWR difficulties and difficulties with other areas of language and literacy. There is also no consensus about the underlying reason for the difficulties (some) children with SLI have with NWR. Some scholars argue that difficulties with phonological short-term memory or storage cause NWR and other language difficulties, whereas others argue that difficulties with NWR may be due more to difficulties with phonological representations. Aims: To investigate NWR abilities and their relationship to other language and literacy abilities in a group of older children with SLI and typically developing controls. To investigate the relative effects of increasing phonological complexity and the number of syllables on the ability of the participants to repeat non-words. Methods & Procedures: An NWR test (The Test of Phonological Structure; TOPhS), which systematically varies phonological complexity, was administered to 15 participants with SLI (aged 11-15 years), 30 language and 15 age controls. Standardized language and literacy tests and a specific test of verb agreement and tense marking (Verb Agreement and Tense Test; VATT) were also administered. Outcomes & Results: The participants with SLI showed a bimodal distribution: half achieved age-appropriate NWR, while half scored significantly below language and age controls (d > 7). The two groups of participants with SLI (high versus low scorers) only differed in NWR (d > 5) and agreement (d > 3) and tense marking (d > 2.5), not on the standardized language and literacy measures administered. NWR was also highly correlated with verb agreement (r= 0.97) and tense marking (r= 0.89) among participants with SLI, but not among controls (r= 0.16 and 0.30 respectively). Phonological complexity was related to NWR accuracy, particularly among participants with SLI. The number of syllables had no independent effect on NWR performance for any group. Conclusions & Implications: Some children with SLI (who have good NWR) have language difficulties unrelated to any of the factors underlying NWR. Others have a (probably additional) deficit which affects NWR and also leads to greater difficulties with verb agreement and tense marking. The results indicate that difficulties with this particular NWR test are more likely to be due to a deficit with phonology per se, rather than with phonological short-term memory or storage.
Authors:
Susan H Ebbels; Julie E Dockrell; Heather K J van der Lely
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-5
Journal Detail:
Title:  International journal of language & communication disorders / Royal College of Speech & Language Therapists     Volume:  47     ISSN:  1460-6984     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-4-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9803709     Medline TA:  Int J Lang Commun Disord     Country:  -    
Other Details:
Languages:  ENG     Pagination:  257-273     Citation Subset:  -    
Copyright Information:
© 2011 Royal College of Speech and Language Therapists.
Affiliation:
Moor House School, Hurst Green, Oxted, UK Division of Psychology and Language Sciences, University College London, London, UK Psychology and Human Development, Institute of Education, London, UK Department of Psychology, Harvard University, Cambridge, MA, USA Laboratoire de Neuropsychologie Interventionnelle, Départament Etudes Cognitives, École Normale Supérieur, Paris, France Psychological Sciences Research Institute, Université Catholique de Louvain, Louvain de Neuve, Belgium.
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