https://www.nbcnews.com/think/opinio...de-ncna1008576
Different to the above claim of a decline in IQ since the 00-years, I read othger authors int he past who said that peak 'IQ already was in the early to mid 70s, and IQ since then is in decline.
A former professor of mine however has rejected intelligence research alltogether, citing disastrous methodological flaws in past IQ studies and unsurpassable inherent contradictions that inevitably must compromise any attempt to "measure" intelligence tests and research. The whole concept of "intelligence" as we try understand the term today - and everybody seems to define the term differently - might be misleading.