A while ago, I did one of these horrific team training things with a large group of people I work with day to day. We were asked to self assess whether we were

A while ago, I did one of these horrific team training things with a large group of people I work with day to day. We were asked to self assess whether we were introverts or extravert's, and then the group assessed each person by secret vote. There was very little match up between how people thought they were, and how everyone else saw them act. Actually, a couple of the loudest, most aggressive, difficult people assessed themselves to be introverts. They were very proud of it, because they had read on the internet that it made them good programmers. I wondered at the time, if the introvert/extrovert division is a real thing, then perhaps they were genuinely introverted, and worked badly with people because they were uncomfortable. Or perhaps they had always tended to be loners because they were not good at people, and had come to believe it was what they preferred.