That's an article from 2005. More recent research: https://www.sciencealert.com/iq-scores-falling-in-worrying-reversal-20th-century-intelligence-boom-flynn-eff

That's an article from 2005. More recent research: https://www.sciencealert.com/iq-scores-falling-in-worrying-reversal-20th-century-intelligence-boom-flynn-effect-intelligence https://www.sciencealert.com/iq-scores-falling-in-worrying-r... https://doi.org/10.1073/pnas.1718793115 https://doi.org/10.1073/pnas.1718793115