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Rice, Mabel L. – Journal of Speech, Language, and Hearing Research, 2020
Purpose: This review article summarizes a program of longitudinal investigation of twins' language acquisition with a focus on causal pathways for specific language impairment (SLI) and nonspecific language impairment in children at 4 and 6 years with known history at 2 years. Method: The context of the overview is established by legacy scientific…
Descriptors: Twins, Genetics, Language Impairments, Age Differences
Rice, Mabel L.; Zubrick, Stephen R.; Taylor, Catherine L.; Hoffman, Lesa; Gayán, Javier – Journal of Speech, Language, and Hearing Research, 2018
Purpose: This study investigates the heritability of language, speech, and nonverbal cognitive development of twins at 4 and 6 years of age. Possible confounding effects of twinning and zygosity, evident at 2 years, were investigated among other possible predictors of outcomes. Method: The population-based twin sample included 627 twin pairs and 1…
Descriptors: Longitudinal Studies, Genetics, Twins, Cognitive Development