I just published a paper with Sascha Baghestanian on expert Go players.
It turns out that having a higher professional Go ranking correlates negatively with cooperation — but being better at logic puzzles correlates positively. This challenges the common wisdom that interactive decisions (game theory) and individual decisions (decision theory) invoke the same kind of personal-utility-maximizing reasoning. By our evidence, only the first one tries to maximize utility through backstabbing. Go figure!
This paper only took three years and four rejections to publish. Sascha got the data by crashing an international Go competition and signing up a bunch of champs for testing.