1. Social Development
2. Behavioral Differences
3. Impaired Communications
4. Sensory Integration Difficulties
5. Incidence
6. Causation
7. Interventions

Incidence

"As recently as 10 years ago, the accepted rate of autism/ASD was four to five in 10,000. Since then the recognition of ASD is such that it is now widely accepted as being present at a rate of one in 165 individuals. You will hear some variation in the rate, but that tends to depend on whether the whole spectrum is being included or just autism, the most classic interpretation of this set of disorders." - The Geneva Centre for Autism

Current data indicates that ASDs occur in 1 of every 110 people. (Centers for Disease Control and Prevention, USA, 2009) Diagnostic criteria have been more clearly defined and broadened in recent years, and this does account for some increase in diagnosis. The apparent rise of cases is one of the many controversies surrounding autism.