title: Do autism spectrum disorders differ from each other and from non-spectrum disorders on emotion recognition tests?
abstract: We tested whether dimensional measures of empathic ability, theory of mind, and intelligence would differentiate autism spectrum disorders from each other and from non-spectrum disorders. Tests were administered to children with a diagnosis of Autistic Disorder (AutD; n = 20), Asperger's Disorder (AspD; n = 28), Attention Deficit/Hyperactivity Disorder (Inattentive Type) (ADHD; n = 35), Mental Retardation (Mild) (MR; n = 34), Anxiety Disorder (AnxD; n = 14), or No Psychological Disorder (NPD; n = 36). Results showed that empathic ability discriminated among groups on the autism spectrum (AutD < AspD < NPD). Because empathic ability is not independent of intelligence (AutD < AspD < NPD on intelligence; MR < ADHD < NPD on empathic ability), both dimensions are necessary to discriminate autism spectrum from non-spectrum disorders. When intelligence is covaried, empathic ability discriminated AutD, but not AspD, from other disorders (AutD < MR < ADHD < NPD = AnxD = AspD).
authors.affiliation: School of Psychology, Curtin University of Technology, Perth, Western Australia.
authors.forename: M J
authors.initials: MJ
authors.lastname: Dyck
authors.forename: K
authors.initials: K
authors.lastname: Ferguson
authors.forename: I M
authors.initials: IM
authors.lastname: Shochet
mesh_terms: D000293:Adolescent; D001008:Anxiety Disorders / Q000175:diagnosis / Q000523:psychology; D020817:Asperger Syndrome / Q000175:diagnosis* / Q000523:psychology; D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis / Q000523:psychology; D001321:Autistic Disorder / Q000175:diagnosis* / Q000523:psychology; D002648:Child; D002675:Child, Preschool; D004644:Emotions; D004645:Empathy; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis / Q000523:psychology; D007360:Intelligence; D008297:Male; D010552:Personality Assessment; D012938:Social Perception