Receptive vocabulary, expressive vocabulary, and speech production of boys with fragile X syndrome in comparison to boys with down syndrome.

Full Abstract

Boys with fragile X syndrome with (n = 49) and without (n = 33) characteristics of autism spectrum disorder, boys with Down syndrome (39), and typically developing boys (n = 41) were compared on standardized measures of receptive vocabulary, expressive vocabulary, and speech administered annually over 4 years. Three major findings emerged. Boys with fragile X without autism spectrum disorder did not differ from the younger typically developing boys in receptive and expressive vocabulary and speech production when compared at similar levels of nonverbal cognitive skills. Boys with fragile X without autism spectrum disorder and typically developing boys had higher receptive vocabulary and speech production than did boys with Down syndrome. There were mixed patterns of results for the boys with fragile X and characteristics of autism spectrum disorder.

Author information

Author/s: Roberts, Joanne (J); Price, Johanna (J); Barnes, Elizabeth (E); Nelson, Lauren (L); Burchinal, Margaret (M); Hennon, Elizabeth A (EA); Moskowitz, Lauren (L); Edwards, Anne (A); Malkin, Cheryl (C); Anderson, Kathleen (K); Misenheimer, Jan (J); Hooper, Stephen R (SR);

Affiliation: University of North Carolina at Chapel Hill, NC 27599-8180, USA. joanne_roberts(-atsign-)unc.edu

Grants: 1 R01 HD044935 (Agency:NICHD NIH HHS) ; 1 R01 HD38819 (Agency:NICHD NIH HHS) ; 1 R03 HD40640 (Agency:NICHD NIH HHS)

Journal and publication information

Publication Type: Journal Article; Research Support, N.I.H., Extramural

Journal: American journal of mental retardation : AJMR (Am J Ment Retard), published in United States. (Language: eng)

Reference: 2007-May; vol 112 (issue 3) : pp 177-93

Dates: Created 2007/06/04; Completed 2007/07/16; Revised 2007/12/03;

PMID: 17542655, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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