Just as the Autistic Disorder Spectrum encompasses a wide range of abilities, the IQ of an autistic person can greatly vary from one person to another. In one study on autistic children, the average IQ was between 50 to 70. At least 55% of the kids fell in this category. Some of the children (16%) had an IQ less than 50. About 30% of the kids had an average IQ, with 3% showing intelligence higher than 115. (PubMed.gov)
What is the average lifespan of an autistic person?