Journal
JOURNAL OF SPEECH LANGUAGE AND HEARING RESEARCH
Volume 43, Issue 2, Pages 340-350Publisher
AMER SPEECH-LANGUAGE-HEARING ASSOC
DOI: 10.1044/jslhr.4302.340
Keywords
Down syndrome; mental retardation; language
Funding
- NICHD NIH HHS [R01 HD23353] Funding Source: Medline
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Predictors of language production skills in 12-minute narratives are investigated cross-sectionally in 48 children and adolescents with Down syndrome (trisomy 21), aged 5 to 20 years, in comparison to 48 control children aged 2 to 6 years matched statistically for nonverbal mental age and mother's years of education. Two models were evaluated by hierarchical regression analyses using predictors drawn from the domains of group membership, chronological age, cognition, socioeconomic status, and hearing screening status (Model I) and, additionally, comprehension performance (Model II). Results showed that Model ii was more successful. In the DS group, it explained 68% of the variability in number of different words, 80% in MLU, and 32% in intelligibility Corresponding percent ages for the control group were 72%, 71%, and 26%. A mechanism linking comprehension of input to early stages of production practice through activation of the early speech motor area is proposed.
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