2. Many different ASD screening tools, some of which could be provided to parents to administer at home.
2.1. Screening Tools
3. ASD varies widely in terms of its symptoms and severity (as outlined by three severity levels).
4. Autism can be detected at a very young age. Even a diagnosis at age 2 can be considered reliable. The Childhood Autism Rating Scale has shown impressive results. Get a professional to administer this test.
5. Specific Diagnostic Criteria (as per DSM-V) - persistent deficits in social communication and social interaction across multiple contexts