The paper this article is based on is quite old already, and many problems with Crabtree's arguments have been pointed out. Here's some reading material: http:

The paper this article is based on is quite old already, and many problems with Crabtree's arguments have been pointed out. Here's some reading material: http://www.guardian.co.uk/science/grrlscientist/2012/nov/14/1 http://www.guardian.co.uk/science/grrlscientist/2012/nov/14/... And there's the last HN-thread with a lot of debunking going on: https://news.ycombinator.com/item?id=4818441 https://news.ycombinator.com/item?id=4818441 And of course, the Flynn effect completely contradicts this, mostly because the Flynn effect is actually based on data (IQ-tests in this case) and not just assumptions like Crabtree did it.