Outcomes of Early Language Delay: II. Etiology of Transient and Persistent Language Difficulties.

Y

15

Child Development; Early Childhood Education; Early Identification; Early Intervention; Environmental Influences; Genetics; Grammar; Heredity; Language Acquisition; Language Impairments; Longitudinal Studies; Predictor Variables; Toddlers; Twins; Vocabulary Development

1092-4388

A study involving 356 twin pairs with early language delay found environmental influences shared by both twins were more substantial than genetic factors. Heritability was significantly higher in those with persisting difficulties but only when assessed in terms of parental concern at 3 years or professional involvement at 4 years. (Contains references.) (CR)

2003

EJ671497