Currently, there are no biomedical tests used to diagnose autism. The diagnosis is based on observations of behaviors and evaluations by psychologists, psychiatrists, developmental pediatricians, and pediatric neurologists.
Over the years, the diagnosis of autism has been based on the Diagnostic and Statistical Manual of Mental Disorders (DSM) published by the American Psychiatric Association (APA), which lists the classification criteria for mental disorders and is the standard used by mental health professionals in the U.S. The fifth edition of the DSM (DSM-5) was released in May 2013. According to the APA, whereas the previous DSM (DSM-IV-TR) had distinct categories for Asperger’s Disorder, Rett’s Disorder, Childhood Disintegrative Disorder, PDD-NOS, and autistic disorder, the new DSM-5 created a single umbrella condition called autism spectrum disorders (ASD’s).
Please refer to the links below for the DSM-5 criteria:
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