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How are autism spectrum disorders (ASDs) classified?

.Autism spectrum disorders (ASDs) are classified as neurobiological conditions. They typically are distinguished by deficits in social communication and the intensity of repetitive behaviors, specificity of interests, rigor of adherence to routines, or severity of unusual reactions to sensory input. They may be further distinguished by level of daily support an affected individual requires, from needing very little support to requiring significant daily assistance.