A study of developmental speech and language disorders in twins.
Fifty-seven same-sex twin sets (32 monozygotic and 25 dizygotic) were examined for concordance of speech and language disorders. Results showed monozygotic twins to have higher concordance than dizygotic twins. In addition, monozygotic twins were more similar in the types of disorders they presented than dizygotic twins. Positive family histories for speech, language, and learning disorders were reported in the nuclear families of the twins.
Lewis
B A
BA
Department of Pediatrics, Case Western Reserve University, Cleveland, OH.
Thompson
L A
LA
D002648:Child; D002657:Child Development; D002663:Child Language; D005190:Family; D005260:Female; D006801:Humans; D007806:Language Disorders / Q000235:genetics*; D007859:Learning Disabilities / Q000235:genetics*; D008297:Male; D013064:Speech Disorders / Q000235:genetics*; D014427:Twins / Q000235:genetics*; D014705:Verbal Behavior