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Daniels, Amy M.; Rosenberg, Rebecca E.; Law, J. Kiely; Lord, Catherine; Kaufmann, Walter E.; Law, Paul A. – Journal of Autism and Developmental Disorders, 2011
The study's objectives were to assess diagnostic stability of initial autism spectrum disorder (ASD) diagnoses in community settings and identify factors associated with diagnostic instability using data from a national Web-based autism registry. A Cox proportional hazards model was used to assess the relative risk of change in initial ASD…
Descriptors: Autism, Identification, Classification, Pervasive Developmental Disorders
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Lord, Catherine; Risi, Susan; Lambrecht, Linda; Cook, Edwin H., Jr.; Leventhal, Bennett L.; DiLavore, Pamela C.; Pickles, Andrew; Rutter, Michael – Journal of Autism and Developmental Disorders, 2000
Psychometric data are presented for 223 children and adults with autism, pervasive developmental disorder not otherwise specified (PDDNOS), or nonspectrum diagnoses who took the Autism Diagnostic Observation Schedule-Generic. Within each module, diagnostic groups were equivalent on expressive language levels. Results indicate substantial…
Descriptors: Adults, Autism, Children, Classification