This Article  • Full text PDF  • Reply to article  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Citing articles on HighWire  • Citing articles on Web of Science (29)  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

Arch Gen Psychiatry. 1991;48(11):1034-1035.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor:—

Pedigree or family studies of stuttering have shown increased risks among relatives, but they have not distinguished between the importance of genetic and shared environmental influences. Twin studies that are free of ascertainment bias can distinguish between these causes, but previous twin studies on clinical samples have properly not sought to distinguish. We report data from a large nonclinical sample of twins that are consistent with a model in which 71% of the variance in liability to stuttering was attributed to additive genetic variance. An alternative model positing familial aggregation due to individual and shared family environment did not fit the data.

Stuttering is a developmental disorder of speech motor control not related to neurosis or emotional disorder in either the parent or child.¹ Ideopathic stuttering begins between ages 2 and 12 years, is more common in males (sex ratio, 2.4:1), and is familial.^2,3 Two . . . [Full Text PDF of this Article]

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?