Hi Ona -
Re-reading my post, I guess it does sound like the test was totally responsible for the epiphany. My error in trying to post a relatively short answer (for me).
My mother is totally an introvert, so I grew up trying to "model" what she is, thinking that I was supposed to fit some kind of mold. That particular shoe didn't fit me very well though.
To answer your question, I realized before the test that I felt energized from being around people and that I had to stop pretending to be something I was not. The test was part of one of my college classes, not something I sought out on it's own- though it was helpful in may ways.