5 ms·

This started going back down in the 1970s: https://www.sciencealert.com/iq-scores-falling-in-worrying-reversal-20th-century-intelligence-boom-flynn-effect-intel

• curo 7y ago
  I'm not an expert, but a brief scan of secondary sources (Wikipedia and Our World In Data) show it going back to 1910 in the Americas at least: https://ourworldindata.org/intelligence https://ourworldindata.org/intelligence Edit: ah excuse me, I misread. I have seen a question about its recent reversal.
  • esalman 7y ago
    I think there's more nuance to the claim from statistical perspective. How is the average estimated, what kind of a distribution does population IQ have, and what factors influence it?
• AlecSchueler 7y ago
  Super interesting to compare this to violent crime rates and the percentage of atmospheric lead!