When diagnosed with autism it is known before the age of three. Symptoms for this disorder would include impaired speech or social interaction, having repetitive behavior such as asking the same questions over and over or doing the same movements. When it comes to the social part of autism some people living with the disorder either become very angry when dealing with other people or are taken for granted. Most do not understand harsh meanings that other people throw at them, or they see they are different from others and seek to be accepted.
As children, kids with autism are not as apparent as kids with normal neutral systems. As babies they do not show any signs of responding to their name often, when children are young
Bibliography: http://www.ninds.nih.gov/disorders/autism/detail_autism.htm http://www.webmd.com/brain/autism/default.htm http://www.autismspeaks.org/what-autism http://www.asha.org/public/speech/disorders/Autism.htm