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Diagnosis of Autism Spectrum Disorders 

Diagnosis of Autism Spectrum Disorders
Diagnosis of Autism Spectrum Disorders

Katherine Gotham

, Somer L. Bishop

, and Catherine Lord

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date: 20 August 2019

This chapter provides an overview of the history of autism and autism spectrum disorder (ASD) classification, including criteria for and presentation of each of the pervasive developmental disorders, participant characteristics that affect diagnosis, instruments and methods for assessing ASD, innovative uses for the diagnostic measures, and diagnostic issues often overlooked in research. Standardized diagnostic criteria and “best practice” assessment measures have been associated with more comparable research findings and the ability to reliably describe younger and milder cases of autism spectrum disorders. Current research is underway to explore the relationship between participant characteristics such as gender, ethnicity, cognitive and language abilities, and comorbid disorders with specific ASD symptoms and severity.

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