But there are also small-subgroups of people with autism that commit crimes because they lack understanding of the laws they have broken. Misunderstandings are especially common regarding autism and sex offenses, since many people with autism do not receive sex education. Cause
Although little is known about the biological basis of autism, studies have revealed structural abnormalities in specific brain regions. Regions identified in the "social" brain include the amygdala, superior temporal sulcus, fusiform gyrus area and orbitofrontal cortex. Further abnormalities have been observed in the caudate nucleus, believed to be involved in restrictive behaviors, as well as in a significant increase in the amount of cortical grey matter and atypical connectivity between brain regions. Diagnosis and IQ
HFA is not a recognised diagnosis by the American Psychological Association (DSM-5) or the World Health Organization (ICD-10). HFA is often, however, used in clinical settings to describe a set of symptoms related to an autism spectrum disorder whereby they exhibit standard autism indicators although have an intelligence quotient (IQ) of 70 or greater.For modern IQ tests, the raw score is transformed to a normal distribution with mean 100 and standard deviation 15. This results in approximately two-thirds of the population scoring between IQ 85 and IQ 115 and about 2.5 percent each above 130 and below 70.IQ scales are ordinally scaled. The raw score of the norming sample is usually (rank order) transformed to a normal distribution with mean 100 and standard deviation 15.
Additionally, individuals with "medium-functioning autism" are typically left out of the discussion entirely, and due to the non-linear nature of the autistic spectrum, individuals can be high-functioning in some areas while at the same time being medium or low functioning in other areas. See also
Asperger syndrome and neuroscience
Autism-spectrum quotient, a self-administered test for high-functioning autism
Historical figures sometimes considered autistic
Low-functioning autism
Nonverbal learning disorder
Lorna Wing

References
Further reading
Robison, John Elder (2007). Look Me in the Eye: My Life with Aspergers. Three Rivers Press. ISBN 9780307395986.