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Direct linkCanfield, Caitlin F.; Edelson, Lisa R.; Saudino, Kimberly J. – Child Development, 2017
Although the phenotypic correlation between language and nonverbal cognitive ability is well-documented, studies examining the etiology of the covariance between these abilities are scant, particularly in very young children. The goal of this study was to address this gap in the literature by examining the genetic and environmental links between…
Descriptors: Genetics, Environmental Influences, Nonverbal Ability, Language Acquisition
Viding, Essi; Price, Thomas S.; Spinath, Frank M.; Bishop, Dorothy V. M.; Dale, Philip S.; Plomin, Robert – Journal of Speech, Language, and Hearing Research, 2003
This study of 4-year-old twins investigated the genetic and environmental origins of comorbidity between language impairment and nonverbal ability by testing the extent to which language impairment in one twin predicted nonverbal ability in the co-twin. Impairment of language ability was defined as scores below the 15th percentile on a general…
Descriptors: Twins, Language Impairments, Language Tests, Genetics
