This seems like common sense

[RAL]

They aren't researching mathematical formulas on how much rage affects gaming ability, but more researching tendencies and mental activities related to playing violent video games. An angry and inconsiderate gamer, as they described, generally does not do well at video games. This doesn't mean they never will, or the amount they are angry affects how well they do playing that game that day, but in how players of an angry or inconsiderate nature/personality does at these video games. And their results are far from surprising. If you're an angry and inconsiderate gamer, who is going to work with you, not to mention you yourself probably wouldn't work with anyone else.. And being successful = teamwork, which ties in with their results of successful gamers being calm, technically proficient, and strategically-thinking.

That would entirely depend on the game, genre, and the people in which you are playing with. :mellow:
I still do not think you could measure such a thing. I know from past experience, playing in a gamesbattle league for console, you hear a lot of screaming, yelling at teammates and cursing. Everyone also works together and kills everything. If you were to go into plain matchmaking with the same attitude, you will get a completely different experience. Depends on the person and grouping of personalities. Then you also have skills, in which you have teams mix and match to find that perfect combination of every asset.