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

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.

A comparison of phonological skills of boys with fragile X syndrome and Down syndrome.

In this study, the authors compared the phonological accuracy and patterns of sound change of boys with fragile X syndrome, boys with Down syndrome, and typically developing mental-age-matched boys. Participants were 50 boys with fragile X syndrome, ages 3 to 14 years; 32 boys with Down syndrome, ages 4 to 13 years; and 33 typically developing boys, ages 2 to 6 years, who were matched for nonverbal mental age to both the boys with fragile X syndrome and the boys with Down syndrome. All participants were administered a standardized articulation test, and their sound accuracy, phonological process, and proportion of whole-word proximity scores were analyzed.

Ten principles of grammar facilitation for children with specific language impairments.

Although they often have significant difficulties in other areas, most children with specific language impairment (SLI) have special difficulties with the understanding and use of grammar. Therefore, most of these children will require an intervention program that targets comprehension or production of grammatical form. Language interventionists are faced with the difficult task of developing comprehensive intervention programs that address the children's grammatical deficits while remaining sensitive to their other existing and predictable social, behavioral, and academic problems.