Why is autism more prevalent today than it was in previous decades?
While the reported prevalence of autism has seen a clear increase in the number of people diagnosed on the autism spectrum in recent years, this doesn’t necessarily suggest that there are more autistic people in the world now. Evidence suggests that the increase is the result of a number of cultural and clinical factors, including greater awareness of autism, and improved diagnostic procedures. Changes in diagnostic criteria has also meant that the broader spectrum of symptoms is now recognised.