Although early indicators are no substitute for a proper diagnostic assessment, there are some warning signs to be aware of. These warning signs do not necessarily indicate that your child has ASD, and some are indicative of other disorders, but concerns can be brought up during screenings and with your Primary Care Physician.
In addition to other assessments, clinicians will use the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-V) (American Psychiatric Association, 2013). According to the DSM-V, the following five criteria are considered for diagnosis:
Autism is also diagnosed with or without intellectual impairment and/or language impairment.