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The Incidence of Cognitive Disabilities in the Siblings of Autistic Children

Published online by Cambridge University Press:  29 January 2018

Gerald J. August ,
Mark A. Stewart  and
Luke Tsai
Gerald J. August
Affiliation:
Department of Psychiatry, University of Iowa College of Medicine, Iowa City, Iowa 52242, USA
Mark A. Stewart
Affiliation:
Department of Psychiatry, University of Iowa College of Medicine, Iowa City, Iowa 52242, USA
Luke Tsai
Affiliation:
Department of Psychiatry, University of Iowa College of Medicine, Iowa City, Iowa 52242, USA
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Summary

Individual components of cognitive disability were assessed in the siblings of 41 autistic probands and compared with similar measures from a control group of siblings of Down's syndrome individuals. The results showed a significant familial clustering of cognitive disabilities in the siblings of autistic probands. These cognitive impairments included disturbances in expressive and receptive language, specific learning disabilities, and varying degrees of mental subnormality.

Type
Research Article
Information
The British Journal of Psychiatry , Volume 138 , Issue 5 , May 1981 , pp. 416 - 422
Copyright
Copyright © Royal College of Psychiatrists, 1981 

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