The link in the article to the actual paper appears to be broken, but there seems to be a copy uploaded here as well: http://files.meetup.com/411954/Intelligenc

The link in the article to the actual paper appears to be broken, but there seems to be a copy uploaded here as well: http://files.meetup.com/411954/Intelligence.pdf http://files.meetup.com/411954/Intelligence.pdf Skimming the article, seems to be a lot of discussion of statistical correlation and some not very persuasive speculation on causal relationships.