Diagnosing ASD can be difficult because there is no medical test, such as a blood test, that can be used to diagnose the disorder. Professionals that diagnose ASD will look at an individual’s behavior across settings and over time, as well as the individual’s early developmental history. ASD can be reliably diagnosed by two years of age by a skilled clinician.
Early signs of ASD can include, but are not limited to:
- Avoids making or difficulty maintaining eye contact.
- Having little interest in other children or caretakers.
- Limited display of language (i.e having fewer words than same age peers or difficulty using words to communicate)
- Easily upset by minor changes in routine and/or highly rigid and inflexible
- Engages in repetitive vocal and/or motor behaviors.
- Unusual reactions to sight, smells, textures, noises, etc.