American IQ scores have rapidly dropped, proving the 'Reverse Flynn effect'

They say scores in spatial reasoning went up while analogies, vocabulary, and numerical reasoning declined.

Hmmm I wonder if an increase use of videogames paired with a decrease in the amount of time parents can spend communicating with their children might be related.

Note that over the last 30 years it's vastly transitioned from one parent staying home raising children to both parents working.

If the Norwegians are to be believed then no.

> A study of Norwegian military conscripts' test records found that IQ scores have been falling for generations born after the year 1975, and that the underlying cause of both initial increasing and subsequent falling trends appears to be environmental rather than genetic.

https://en.wikipedia.org/wiki/Intelligence_quotient