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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

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Peer reviewed Peer reviewed
ERIC Number: EJ640595
Record Type: CIJE
Publication Date: 2001
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0022-0663
Longitudinal Analysis of the Genetic and Environmental Influences on Components of Cognitive Delay in Preschoolers.
Eley, Thalia C.; Dale, Philip; Bishop, Dorothy; Price, Thomas S.; Plomin, Robert
Journal of Educational Psychology, v93 n4 p698-707 Dec 2001
Etiology of verbal and performance delays were investigated in a large population sample of twins at 2 and 3 years (N=2,449 pair). Longitudinal genetic analyses indicated substantial heritability of verbal delay from 2 to 3 years, especially in combination with performance delay. Results suggest a strong genetic contribution to verbal delay regardless of nonverbal impairment. (Author)
Descriptors: Biological Influences, Cognitive Ability, Cognitive Development, Developmental Delays, Family Environment, Heredity, Longitudinal Studies, Preschool Children, Social Influences, Verbal Ability
Publication Type: Journal Articles
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: N/A