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. 2009 Aug;52(4):1048-61.
doi: 10.1044/1092-4388(2009/08-0001).

Phonological accuracy and intelligibility in connected speech of boys with fragile X syndrome or Down syndrome

Elizabeth Barnes  1 , Joanne Roberts, Steven H Long, Gary E Martin, Mary C Berni, Kerry C Mandulak, John Sideris
Affiliations

Phonological accuracy and intelligibility in connected speech of boys with fragile X syndrome or Down syndrome

Elizabeth Barnes et al. J Speech Lang Hear Res. 2009 Aug.

Abstract

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), and 45 TD boys of similar nonverbal mental age. We used connected speech samples to compute measures of phonological accuracy, phonological process occurrence, and intelligibility.

Results: The boys with FXS, regardless of autism status, did not differ from TD boys on phonological accuracy and phonological process occurrence but produced fewer intelligible words than did TD boys. The boys with DS scored lower on measures of phonological accuracy and occurrence of phonological processes than all other groups and used fewer intelligible words than did TD boys. The boys with FXS and the boys with DS did not differ on measures of intelligibility.

Conclusions: Boys with FXS, regardless of autism status, exhibited phonological characteristics similar to those of younger TD children but were less intelligible in connected speech. Boys with DS showed greater delays in all phonological measures than the boys with FXS and the TD boys.

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References

    1. Abbeduto L, Brady, Kover Language development and fragile X syndrome: Profiles, syndrome-specificity, and within-syndrome differences. Mental Retardation and Developmental Disabilities Research Reviews. 2007;13(1):36–46. - PMC - PubMed
    1. Abbeduto L, Hagerman R. Language and communication in fragile X syndrome. Mental Retardation and Developmental Disabilities Research Reviews. 1997;3:313–322.
    1. Abbeduto L, Murphy MM, Cawthon SW, Richmond EK, Weissman MD, Karadottir MD, et al. Receptive language skills of adolescents and young adults with down or fragile X syndrome. American Journal of Mental Retardation. 2003;108(3):149–60. - PubMed
    1. Adams L. Oral-motor and motor-speech characteristics of children with autism. Focus on Autism and Other Developmental Disabilities. 1998;13(2):108–112.
    1. Andrews N, Fey ME. Analysis of the speech of phonologically impaired children in two sampling conditions. Language, Speech, and Hearing Services in Schools. 1986;17:187–198.

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