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Giovannone, Nikole; Theodore, Rachel M. – Journal of Speech, Language, and Hearing Research, 2021
Purpose: The extant literature suggests that individual differences in speech perception can be linked to broad receptive language phenotype. For example, a recent study found that individuals with a smaller receptive vocabulary showed diminished lexically guided perceptual learning compared to individuals with a larger receptive vocabulary. Here,…
Descriptors: Individual Differences, Genetics, Auditory Perception, Speech Communication
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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
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Viding, Essi; Spinath, Frank M.; Price, Thomas S.; Bishop, Dorothy V. M.; Dale, Philip S.; Plomin, Robert – Journal of Child Psychology and Psychiatry, 2004
Background: We investigated the aetiology of language impairment in 579 four-year-old twins with low language performance and their co-twins, members of 160 MZ twin pairs, 131 same-sex DZ pairs and 102 opposite-sex DZ pairs. Methods: Language impairment in 4-year-olds was defined by scores below the 15th percentile on a general factor derived from…
Descriptors: Twins, Etiology, Language Impairments, Language Tests