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Developmental Trajectories of Grammatical Comprehension in Individuals with Williams Syndrome

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Title: Developmental Trajectories of Grammatical Comprehension in Individuals with Williams Syndrome
Language: English
Authors: Harry R. M. Purser (ORCID 0000-0003-3307-8421), Vesna Stojanovik, Christopher Jarrold (ORCID 0000-0001-8662-0937), Emily K. Farran, Michael S. C. Thomas, Jo Van Herwegen
Source: First Language. 2025 45(4):476-495.
Availability: SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: https://sagepub.com
Peer Reviewed: Y
Page Count: 20
Publication Date: 2025
Document Type: Journal Articles
Reports - Research
Descriptors: Grammar, Language Processing, Child Development, Intellectual Disability, Language Aptitude, Language Acquisition, Cognitive Ability, Prediction, Children, Adolescents, Young Adults, Interpersonal Communication, Receptive Language, Developmental Stages, Age Differences, Language Tests, Vocabulary Development, Scores, Comparative Analysis, Intelligence Tests, Foreign Countries
Geographic Terms: United Kingdom
Assessment and Survey Identifiers: Raven Progressive Matrices
DOI: 10.1177/01427237251326625
ISSN: 0142-7237
1740-2344
Abstract: Despite earlier claims that language abilities are intact in individuals with Williams syndrome (WS), many studies have shown that language development is often delayed and atypical, that is, it develops in line with different cognitive abilities compared to typically developing populations. It is unclear, however, whether general cognitive development predicts language comprehension in WS. The current study is the first to examine the development of grammatical comprehension in a large group (N = 58) of individuals with WS aged 5 to 21 years old. Grammatical comprehension is key to a person's ability to understand what is being said and engage in successful social interaction. Using cross-sectional developmental trajectories, performance on the Test for the Reception of Grammar was shown to increase with chronological age and performance was predicted by vocabulary scores, but not non-verbal ability. In addition, there was no meaningful difference between items that contained spatial language and similar grammatical constructions that did not contain spatial language and performance on both types of expressions was similarly predicted by vocabulary scores. Overall, these results show that grammatical development in WS is delayed but not atypical in its relationship to vocabulary.
Abstractor: As Provided
Entry Date: 2025
Accession Number: EJ1477850
Database: ERIC
FullText Text:
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  Data: <searchLink fieldCode="AR" term="%22Harry+R%2E+M%2E+Purser%22">Harry R. M. Purser</searchLink> (ORCID <externalLink term="https://orcid.org/0000-0003-3307-8421">0000-0003-3307-8421</externalLink>)<br /><searchLink fieldCode="AR" term="%22Vesna+Stojanovik%22">Vesna Stojanovik</searchLink><br /><searchLink fieldCode="AR" term="%22Christopher+Jarrold%22">Christopher Jarrold</searchLink> (ORCID <externalLink term="https://orcid.org/0000-0001-8662-0937">0000-0001-8662-0937</externalLink>)<br /><searchLink fieldCode="AR" term="%22Emily+K%2E+Farran%22">Emily K. Farran</searchLink><br /><searchLink fieldCode="AR" term="%22Michael+S%2E+C%2E+Thomas%22">Michael S. C. Thomas</searchLink><br /><searchLink fieldCode="AR" term="%22Jo+Van+Herwegen%22">Jo Van Herwegen</searchLink>
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  Data: SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: https://sagepub.com
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  Data: Despite earlier claims that language abilities are intact in individuals with Williams syndrome (WS), many studies have shown that language development is often delayed and atypical, that is, it develops in line with different cognitive abilities compared to typically developing populations. It is unclear, however, whether general cognitive development predicts language comprehension in WS. The current study is the first to examine the development of grammatical comprehension in a large group (N = 58) of individuals with WS aged 5 to 21 years old. Grammatical comprehension is key to a person's ability to understand what is being said and engage in successful social interaction. Using cross-sectional developmental trajectories, performance on the Test for the Reception of Grammar was shown to increase with chronological age and performance was predicted by vocabulary scores, but not non-verbal ability. In addition, there was no meaningful difference between items that contained spatial language and similar grammatical constructions that did not contain spatial language and performance on both types of expressions was similarly predicted by vocabulary scores. Overall, these results show that grammatical development in WS is delayed but not atypical in its relationship to vocabulary.
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