Methodology: type "autism incidence" into google scholar, filter by articles since 2015 and read some on the first page. Conclusion: It's still pretty-well amb

Methodology: type "autism incidence" into google scholar, filter by articles since 2015 and read some on the first page. Conclusion: It's still pretty-well ambiguous as far as I can tell. You're right that it's not conclusively increasing. https://link.springer.com/article/10.1007/s10803-018-3834-0 https://link.springer.com/article/10.1007/s10803-018-3834-0 -- Says true autism rates increased between '85 and '98, but since then only diagnosis of autism has been increasing til '04. https://www.cambridge.org/core/journals/bjpsych-open/article/changes-in-diagnosis-rates-and-behavioural-traits-of-autism-spectrum-disorder-over-time/1DE1422635BC28CBEA38BAB6FFA5C176 https://www.cambridge.org/core/journals/bjpsych-open/article... I note that I think it's also pretty well-agreed upon that rates don't match up between countries.