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The Children's Nonword Repetition Test (CNRep) was given 39 children with persistent language impairment (LI), 13 with a history of having received speech-language therapy (resolved LI), and 79 controls, all aged from 7 to 9 years. The children with LI were twins who had participated in a previous genetic study. Children with resolved LI, as well as those with persistent LI, were significantly impaired on the CNRep. Comparisons of MZ and DZ twins indicated significant heritability of a CNRep deficit. It is concluded that CNRep provides a marker of the phenotype of heritable forms of developmental language impairment.

Type

Journal article

Journal

J Child Psychol Psychiatry

Publication Date

05/1996

Volume

37

Pages

391 - 403

Keywords

Child, Diseases in Twins, Female, Genetic Markers, Humans, Language Development Disorders, Language Tests, Language Therapy, Male, Phenotype, Phonetics, Speech Disorders, Speech Therapy, Twins, Dizygotic, Twins, Monozygotic