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Autism Spectrum Australia. Characteristics. Autism is characterised by marked difficulties in behaviour, social interaction, communication and sensory sensitivities. Some of these characteristics are common among people on the spectrum; others are typical of the disability but not necessarily exhibited by all people on the autism spectrum.
Autism is a neurodevelopmental disorder characterized by impaired social interaction, verbal and non-verbal communication, and restricted and repetitive behavior. Parents usually notice signs in the first two years of their child's life.utism has a strong genetic basis, although the genetics of autism are complex and it is unclear whether ASD is explained more by rare mutations with major effects, or by rare multigene interactions of common genetic variants.