Contrary to IQ levels of those who are victims of mental deficiency, levels of those suffering from autism vary from person to person, depending on the severity of the condition. Even if autistic individuals have low IQ levels, they have several other strengths and abilities that help them stand out. For instance, some autistic children and adults may have a low intelligence quotient, but may show strong artistic or musical skills. There may be some autistic persons who may have average IQ levels, above 70. However, those who have severe autism, which makes for almost 70% of cases of autism, will give a score of below seventy.