Brief report: Differences in sex ratios in autism as a function of measured intelligence
Results from analyses of sex ratios as a function of IQ are presented for 623 autistic children (487 males, 136 females) and 506 nonautistic, communication-handicapped and behavior-disordered children (374 males, 132 females). Proportionately more autistic females were found to have IQs of 34 or below than above 34. However, a linear trend of an increasing number of males with increasing intelligence was found only for nonautistic subjects. The relevance of these findings to genetic factors and the heterogeneity of autism is discussed.
Unable to display preview. Download preview PDF.
- Baker, L., & Cantwell, D.P. (1982). Language acquisition, cognitive development, and emotional disorder in childhood. In K. E. Nelson (Ed.),Children's language (Vol. 3) (pp. 286–321). Hillsdale, New Jersey: Erlbaum.Google Scholar
- Fein, D., Waterhouse, L., Lucci, D., & Snyder, D. (1983, February).Cognitive Subtypes in infantile autism. Paper presented at the meeting of the International Neuropsychological Society, Mexico City.Google Scholar
- Gottesman, I. I., Shields, J., & Hanson D. (1982).Schizophrenia: The epigenetic puzzle. New York: Cambridge University Press.Google Scholar
- Lord, C. (1984). On the differences between the sexes [Letter to the editor].Journal of Autism and Developmental Disorders, 14, 212–214.Google Scholar
- Lotter, V. (1966). Epidemiology of autistic conditions in young children. 1. Prevalence.Social Psychiatry, 124–137.Google Scholar
- Rutter, M. (1978). Diagnosis and definition. In M. Rutter & E. Schopler (Eds.),Autism: A reappraisal of concepts and treatment (pp. 1–26). New York: Plenum.Google Scholar
- Rutter, M. (1984). Infantile autism: Assessment, differential diagnosis and treatment. In D. Shaffer, A. Erdhard, & L. Greenhill (Eds.),A clinician's guide to child psychiatry. New York: Free Press.Google Scholar
- Siegal-Gorelick, B. (1983).Research on empirical sub-classification of children with autism. Paper presented at the annual meeting of the National Society for Adults and Children with Autism, Salt Lake City.Google Scholar
- Wing, L. (1984). Some questions on sex differences [Letter to the editor].Journal of Autism and Developmental Disorders, 14, 212.Google Scholar
- Wittig, M. A. (1979). Genetic influences on sex-related differences in intellectual performance: Theoretical and methological issues. In M. A. Wittig & A. C. Petersen (Eds.),Sex related differences in cognitive functioning (pp. 21–63). New York: Academic Press.Google Scholar