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Direct linkViding, 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
