I think there's an error in the blog post, because the 4th graph is the same as the 3rd. It should probably be http://danluu.com/images/dunning-kruger/dunning_

I think there's an error in the blog post, because the 4th graph is the same as the 3rd. It should probably be http://danluu.com/images/dunning-kruger/dunning_4.png http://danluu.com/images/dunning-kruger/dunning_4.png which shows a positive correlation for "perceived logical reasoning ability and test performance". That then helps explain the statement "In two of the four cases, there’s an obvious positive correlation between perceived skill and actual skill".