Twelve months: By this time babies should respond nonverbally, have different types of cries, and may know one or a few simple words (e.g. "mama" or "dada").
They may also be unable to communicate nonverbally, may be unable to make eye contact, and may stand motionless with fear as they are confronted with specific social settings.
Autistic individuals typically are limited in their ability to communicate nonverbally and verbally.
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