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Syntactic Growth of Adolescent Boys with Fragile X Syndrome or Down Syndrome: A Longitudinal Study
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Jamie Linert; Lizbeth H. Finestack; Leonard Abbeduto – Journal of Speech, Language, and Hearing Research, 2025
Purpose: The current study addresses a gap in the literature regarding syntactic development of adolescent boys with fragile X syndrome (FXS) and Down syndrome (DS). Specifically, we ask whether syntactic skills plateau or continue to change during adolescence for these groups and whether the profile of syntactic change differs between boys with…
Descriptors: Syntax, Adolescents, Males, Genetic Disorders
Language Development from Early Childhood to Adolescence in Youths with Fragile X Syndrome
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Brady, Nancy C.; Fleming, Kandace; Bredin-Oja, Shelley L.; Fielding-Gebhardt, Heather; Warren, Steven F. – Journal of Speech, Language, and Hearing Research, 2020
Purpose: The aim of this study was to investigate language growth in individuals with fragile X syndrome (FXS) from early childhood to adolescence and the influence of maternal responsivity on language growth. Method: We conducted a longitudinal analysis of language development in 55 youths (44 males, 11 females) with FXS. Data collection spanned…
Descriptors: Intellectual Disability, Language Acquisition, Vocabulary Development, Standardized Tests
Longitudinal Profiles of Expressive Vocabulary, Syntax and Pragmatic Language in Boys with Fragile X Syndrome or Down Syndrome
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Martin, Gary E.; Losh, Molly; Estigarribia, Bruno; Sideris, John; Roberts, Joanne – International Journal of Language & Communication Disorders, 2013
Background: Fragile X syndrome (FXS) and Down syndrome (DS) are the two leading genetic causes of intellectual disability, and FXS is the most common known genetic condition associated with autism. Both FXS and DS are associated with significant language impairment, but little is known about expressive language across domains over time or the role…
Descriptors: Expressive Language, Vocabulary, Syntax, Pragmatics
Phonological Accuracy and Intelligibility in Connected Speech of Boys with Fragile X Syndrome or Down Syndrome
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Barnes, Elizabeth; Roberts, Joanne; Long, Steven H.; Martin, Gary E.; Berni, Mary C.; Mandulak, Kerry C.; Sideris, John – Journal of Speech, Language, and Hearing Research, 2009
Purpose: To compare the phonological accuracy and speech intelligibility of boys with fragile X syndrome with autism spectrum disorder (FXS-ASD), fragile X syndrome only (FXS-O), Down syndrome (DS), and typically developing (TD) boys. Method: Participants were 32 boys with FXS-O (3-14 years), 31 with FXS-ASD (5-15 years), 34 with DS (4-16 years),…
Descriptors: Phonology, Males, Down Syndrome, Genetic Disorders