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    J Autism Dev Disord. 2008 Mar;38(3):507-15. Epub 2007 Aug 4.

    Visuo-spatial processing in autism--testing the predictions of extreme male brain theory.

    Source

    Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, UK. cmf42@cam.ac.uk

    Abstract

    It has been hypothesised that autism is an extreme version of the male brain, caused by high levels of prenatal testosterone (Baron-Cohen 1999). To test this proposal, associations were assessed between three visuo-spatial tasks and prenatal testosterone, indexed in second-to-fourth digit length ratios (2D:4D). The study included children with Autism Spectrum Disorder, ASD (N = 28), and chronological as well as mental age matched typically-developing children (N = 31). While the group with ASD outperformed the control group at Mental Rotation and Figure-Disembedding, these group differences were not related to differences in prenatal testosterone level. Previous findings of an association between Targeting and 2D:4D were replicated in typically-developing children and children with ASD. The implications of these results for the extreme male brain (EMB) theory of autism are discussed.

    PMID:
    17674175
    [PubMed - indexed for MEDLINE]

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