Pop psychologists freely use words such as introvert and extravert. But as Curt and Anne Bartol point out, two out of every three people will score in the ‘average’ range on the extraversion dimension, thus disqualifying them from studies based on extraversion and introversion. Roughly 16 percent of the population are extraverts, and another 16 percent introverts, and the remainder (68 percent) are ambiverts.
It may be tempting to think of extraversion and introversion as two sides of a coin—that each of us is either one or the other—but this is simply not the case.
Via Gina Stepp