Part 1 of Essay
is a rare mental disorder that impairs a person's abilities. They have the largest problem talking and socializing with others. is usually diagnosed within the first 30 months of life. Autistic children usually appear to be normal as far as their looks are concerned. occurs in 4.5 children out of every 10,000 births ....

Part 2 of Essay
.... mentally retarded people. They don't seem aware that people are around them, including family members. Another thing that separates them from the mentally retarded is their display of strange postures, manners, habits, and compulsions. They might display rocking, hand flapping, strange food preferences, no eye contact, head banging, an insensitivity to pain, and other dangerous behavior. They are also often infatuated with inanimate objects. About 50 % of all autistic individuals are mute, or only speak once o ....