Well, these guys aren't psychologists: they are physics PhDs doing (judging from the name of their group, Grupo Interdisciplinar de Sistemas Complejos) some work with agent-based modelling and game theory. They seem more like econophysicists (or economists) than psychologists.

I don't think this categorization is gonna get popular enough to hit the tabloids (you won't be filling up quizzes to see whether your significant other is 'Envious' or not), but it might be relevant to social science.