There is a paucity of diagnostic instruments for adults with autism spectrum disorder (ASD). This study evaluates the psychometric properties of the Swedish version of the Ritvo Autism and Asperger Diagnostic Scale-Revised (RAADS-R), an 80-item self-rating scale designed to assist clinicians diagnosing ASD in adults. It was administered to 75 adults with ASD and 197 comparison cases. Also, a subset completed the Autism Spectrum Quotient (AQ). Three out of four subscales had high internal consistency. Sensitivity was 91% and specificity was 93%. The ASD subjects had significantly higher mean scores on all subscales. ASD females had higher scores than ASD males on the sensory motor subscale, a dimension not included in the AQ. RAADS-R showed promising test re-test reliability.
Cites: Autism. 2003 Sep;7(3):255-6814516059
Cites: J Autism Dev Disord. 2003 Feb;33(1):3-1312708575
Cites: J Autism Dev Disord. 1994 Oct;24(5):659-857814313
Cites: Ment Retard Dev Disabil Res Rev. 2004;10(4):234-4715666341
Cites: J Autism Dev Disord. 2005 Jun;35(3):331-516119474
Cites: J Autism Dev Disord. 2007 Oct;37(9):1735-4717146700