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Peer reviewedSmalley, Susan L.; And Others – Journal of Autism and Developmental Disorders, 1992
A literature review of autism and tuberous sclerosis complex (TSC) substantiates a significant association between the two. Studies of 14 autistic probands and 13 TSC probands identified 7 TSC subjects with autism, who had more seizures and mental retardation than those without autism. More male TSC probands with autism than female were…
Descriptors: Autism, Correlation, Genetics, Heredity
Peer reviewedAmbrose, Nicoline Grinager; And Others – Journal of Speech and Hearing Research, 1993
Analysis of pedigrees from parents of 69 preschool children who stuttered revealed that more male than female relatives ever stuttered but that female subjects who stuttered had more female relatives who ever stuttered than did male subjects. Segregation analyses suggest that transmission of a single major genetic locus increases the liability to…
Descriptors: Family Influence, Females, Genetics, Heredity
Peer reviewedHealy, Jane M.; Aram, Dorothy M. – Annals of Dyslexia, 1986
Family histories of 12 hyperlexic (precocious word reading with little comprehension often associated with autism) children (5-10 years old) were investigated. Results suggested familial tendencies to disorders of language, reading, writing, and spelling in male relatives, along with a high incidence of nonright-handedness. (Author/DB)
Descriptors: Autism, Dyslexia, Family Characteristics, Family History
Peer reviewedPennington, Bruce F.; And Others – Journal of Learning Disabilities, 1992
This study of 640 twins with reading disability and 436 controls (mean age 12) examined external validity of the distinction between specific reading retardation and reading backwardness, in 3 domains: genetic etiology, sex ratio and clinical correlates, and neuropsychological profiles. There was no evidence of differential genetic etiology of the…
Descriptors: Age Differences, Definitions, Educational Diagnosis, Elementary Secondary Education
Peer reviewedGill, C. E.; And Others – British Journal of Educational Psychology, 1985
This study analyzed the Tertiary Admission Examination and Australian Scholastic Aptitude Test results for 264 pairs of 17-year-old monozygotic and dizygotic twins in Western Australia to determine if examination performance is influenced by environmental or genetic factors. Purely environmental models are rejected as inadequate explanations of…
Descriptors: Academic Achievement, Analysis of Covariance, Cognitive Ability, Environmental Influences
