A new study analyzing interactions among 300,000+ players in an online game universe, called Pardus, has for the first time provided large-scale evidence to prove an 80-year-old psychological theory called Structural Balance Theory. The research, published in PNAS, shows that individuals tend to avoid stress-causing relationships when they develop a society, resulting in more stable social networks.

http://games.slashdot.org/story/10/0...raction-Theory