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Nonword Repetition as a Behavioural Marker for Inherited Language Impairment: Evidence From a Twin Study
Author(s) -
Bishop D. V. M.,
North T.,
Donlan C.
Publication year - 1996
Publication title -
journal of child psychology and psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.652
H-Index - 211
eISSN - 1469-7610
pISSN - 0021-9630
DOI - 10.1111/j.1469-7610.1996.tb01420.x
Subject(s) - psychology , specific language impairment , repetition (rhetorical device) , language impairment , developmental psychology , heritability , language disorder , twin study , audiology , language development , cognition , linguistics , psychiatry , medicine , genetics , philosophy , biology
The Children's Nonword Repetition Test (CNRep) was given to 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.