Home Health Parents News Now Scientist Asks: Is Autism Really on the Rise? Scientist Asks: Is Autism Really on the Rise? By Holly Lebowitz Rossi July 27, 2012 Advertisement Save Pin FB More Tweet Email Send Text Message Print Boy On A Swing At The Park 29786 That kind of change is called "diagnostic substitution," Willingham explains, and it accounts for a lot of the rise in autism diagnoses. And there's a lot of other, corroborating evidence, too. If autism were on the rise, you'd expect there to be more autistic children that autistic adults. Adults, though, don't tend to be screened for autism -- and when you do screen them, you find that the prevalence of autism is about the same among adults as it is among kids (1%). That suggests that autism isn't on the rise. And that prevalence is the same all over the world, despite the fact that that the environmental factors which often take the blame for the rise in autism are unevenly distributed. Image: Toddler on a swing, via Shutterstock. By Holly Lebowitz Rossi Save Pin FB More Tweet Email Send Text Message Print Comments Add a Comment Be the first to comment! No comments yet. Advertisement Close this dialog window Add a comment Scientist Asks: Is Autism Really on the Rise? Add your comment... Cancel Submit Success! Thanks for adding your feedback.