• What I mean when I think intelligence:
  • the correlation between most intellectual abilities, while positive, is only about 0.2 - 0.4 via Scott Alexander link
  • National IQs calculated and validated for 108 nations – via Scott Alexander
  • Intelligence is a good predictor of performance on different tasks but not as good as fiver personality traits via Spencer Greenberg
  • Spencer Greenberg – What's really true about intelligence and IQ? We empirically tested 40 claims clearerthinking twitter
  • Typical estimates for adult IQ found it was about 60% genetic, 40% unpredictable, and barely related at all to parenting or family environment.