Comment by mcswell

Probably off-topic, but: Myers Briggs seems to be based on the idea that its four properties are each dichotomous, e.g. most people are either introverted or extroverted. I would imagine that the tendency to be Y-troverted is in fact more unimodal than bimodal--if so, most people would be somewhere in the middle on most traits. Of course if the traits are not independent, that might mean that there are not many people who are in the middle on all four traits; but if they are independent, then I would expect a substantial number of people to be somewhere around average on all four traits. How broad that "somewhere around" number would be, I have no idea.