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The Prevalence, Stability and Significance of Developmental Language Delay in Preschool Children

A sample of 937 children in Dunedin, New Zealand, was assessed at ages three and five years in order to estimate the nature, prevalence, stability and significance of developmental language delays in three‐year‐olds. Assessments included language development, intelligence, and fine and gross motor co‐ordination. Detailed results are given which describe three types of language delay at age three: delayed verbal comprehension only, delayed verbal expression only, and delayed development in both aspects of language.