November 8, 2011Open Access
View Full PaperA Multisite Study of the Clinical Diagnosis of Different Autism Spectrum Disorders
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Abstract
Clinical distinctions among categorical diagnostic subtypes of autism spectrum disorders were not reliable even across sites with well-documented fidelity using standardized diagnostic instruments. Results support the move from existing subgroupings of autism spectrum disorders to dimensional descriptions of core features of social affect and fixated, repetitive behaviors, together with characteristics such as language level and cognitive function.