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Means and 95% confidence intervals for standardized language tests administered at 4.5 (left column) and 10.5 (right column) years of age. Peabody Picture Vocabulary Test (both test ages), Preschool Language Scale: Receptive and Expressive scales (at age 4.5 years), Clinical Evaluation of Language Function: Receptive and Expressive scales (at age 10.5 years).
