You don't say how old of a child you're talking about. These are some of the earliest signs, but certainly not ALL of them, as ASD (Autism Spectrum Disorder) signs are many and varied. A few early signs include:
No pointing at things or people to get you to look at them.
No big smiles, or joyful expressions.
No babbling by 12 months.
No back and forth sharing of sounds, smiles, or facial expressions.
Doesn't respond when you call his/her name, usually babies will do this by about 7 months.
Lack of language development of either 1 or 2 word phrases, or they will merely echo what someone else has said without comprehending what it means.
VERY IMPORTANT: The earlier the detection and treatment, the less impact this will have later on for your baby, and for your family in providing structure. If you are concerned about this, talk to your doctor and describe what you are seeing.
at 8:23 AM on Aug. 3, 2009