First of all is the Flynn effect where IQ has gradually increased over the past century due to various factors such as education and improved nutrition but has plateaued since around 2010.
While this predates the AI revolution latest studies studies indicate an anti-Flynn effect may now be in effect with IQ scores falling.
A reason for this is an over reliance on AI resulting in diminished skills for independent problem solving.
Light weight report.
www.forbes.com
Heavier academic paper.

While this predates the AI revolution latest studies studies indicate an anti-Flynn effect may now be in effect with IQ scores falling.
A reason for this is an over reliance on AI resulting in diminished skills for independent problem solving.
Light weight report.

AI Is Making You Dumber, Microsoft Researchers Say
AI can speed up the completion of menial tasks and boost productivity, but it might also be making us dumber — or so suggests a new study by Microsoft.

Heavier academic paper.