Verb production by individuals with Down syndrome during narration.
Down syndrome
Expressive language
Expressive vocabulary
Intellectual disability
Verbs
Word categories
Journal
Research in developmental disabilities
ISSN: 1873-3379
Titre abrégé: Res Dev Disabil
Pays: United States
ID NLM: 8709782
Informations de publication
Date de publication:
Feb 2019
Feb 2019
Historique:
received:
07
02
2018
revised:
13
08
2018
accepted:
12
11
2018
pubmed:
1
12
2018
medline:
23
4
2019
entrez:
1
12
2018
Statut:
ppublish
Résumé
Despite research identifying verb knowledge as a strong predictor of later syntactic skills in typical development, virtually no research has examined verb development in Down syndrome. The purpose of this study was to examine verb production (density, diversity, and type-token ratios) by individuals with Down syndrome in the context of story generation relative to two comparison groups - nonverbal cognitive ability level matches with typical development and chronological age matches with mixed-etiology intellectual disability. Thirty-five participants with Down syndrome (11-21 years), 27 participants with intellectual disability (13-20 years), and 29 participants with typical development (4-6 years) completed a narrative story generation task. Transcripts were coded and analyzed for verb production. Examining overall verb production, participants with Down syndrome produced narratives with less verb density than participants with typical development and had smaller verb type-token ratios than participants with intellectual disability. Upon examining lexical verb production, participants with Down syndrome produced narratives with less lexical verb density than participants with typical development. The results indicate that individuals with Down syndrome have a developmentally appropriate diversity of verbs in their lexicon but are not using verbs as frequently as comparison groups.
Sections du résumé
BACKGROUND
BACKGROUND
Despite research identifying verb knowledge as a strong predictor of later syntactic skills in typical development, virtually no research has examined verb development in Down syndrome.
AIMS
OBJECTIVE
The purpose of this study was to examine verb production (density, diversity, and type-token ratios) by individuals with Down syndrome in the context of story generation relative to two comparison groups - nonverbal cognitive ability level matches with typical development and chronological age matches with mixed-etiology intellectual disability.
METHODS AND PROCEDURES
METHODS
Thirty-five participants with Down syndrome (11-21 years), 27 participants with intellectual disability (13-20 years), and 29 participants with typical development (4-6 years) completed a narrative story generation task. Transcripts were coded and analyzed for verb production.
OUTCOMES AND RESULTS
RESULTS
Examining overall verb production, participants with Down syndrome produced narratives with less verb density than participants with typical development and had smaller verb type-token ratios than participants with intellectual disability. Upon examining lexical verb production, participants with Down syndrome produced narratives with less lexical verb density than participants with typical development.
CONCLUSIONS AND IMPLICATIONS
CONCLUSIONS
The results indicate that individuals with Down syndrome have a developmentally appropriate diversity of verbs in their lexicon but are not using verbs as frequently as comparison groups.
Identifiants
pubmed: 30500721
pii: S0891-4222(18)30233-6
doi: 10.1016/j.ridd.2018.11.007
pmc: PMC6326887
mid: NIHMS1515213
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
82-91Subventions
Organisme : NICHD NIH HHS
ID : R01 HD055345
Pays : United States
Organisme : NICHD NIH HHS
ID : U54 HD079125
Pays : United States
Informations de copyright
Copyright © 2018 Elsevier Ltd. All rights reserved.
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