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50 Years of ERIC
50 Years of ERIC
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Peer reviewed Peer reviewed
ERIC Number: EJ590123
Record Type: CIJE
Publication Date: 1999
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0012-1649
Genetic and Environmental Origins of Verbal and Performance Components of Cognitive Delay in 2-Year-Olds.
Eley, Thalia C.; And Others
Developmental Psychology, v35 n4 p1122-31 Jul 1999
Investigated the etiology of several measures of cognitive delay in over 3,000 pairs of 2-year-old twins, focusing on group-differences heritability for general and specific cognitive delays. Concluded that because the genetic and environmental origins of verbal and performance delays in infancy differ, they are better considered separately rather than combined into a composite measure of general cognitive delay. (Author/KB)
Descriptors: Cognitive Ability, Cognitive Development, Developmental Delays, Etiology, Mental Retardation, Nature Nurture Controversy, Toddlers, Twins
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: N/A