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Hoekstra, Rosa A.; Vinkhuyzen, Anna A. E.; Wheelwright, Sally; Bartels, Meike; Boomsma, Dorret I.; Baron-Cohen, Simon; Posthuma, Danielle; van der Sluis, Sophie – Journal of Autism and Developmental Disorders, 2011
This study reports on the development and validation of an abridged version of the 50-item Autism-Spectrum Quotient (AQ), a self-report measure of autistic traits. We aimed to reduce the number of items whilst retaining high validity and a meaningful factor structure. The item reduction procedure was performed on data from 1,263 Dutch students and…
Descriptors: Autism, Factor Structure, Foreign Countries, Pervasive Developmental Disorders
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Wakabayashi, Akio; Baron-Cohen, Simon; Uchiyama, Tokio; Yoshida, Yuko; Kuroda, Miho; Wheelwright, Sally – Journal of Autism and Developmental Disorders, 2007
This study tests the empathizing-systemizing (E-S) theory of sex differences and the extreme male brain (EMB) theory of autism. Three groups of participants took part: n = 48 people with autism spectrum, n = 137 general population controls, and n = 1,250 university student controls. Each participant completed the Empathy Quotient (EQ) and the…
Descriptors: Control Groups, Females, Autism, Brain