Oftentimes when people hear the word extrovert, the words "sociable" and "gregarious" come to mind, while the word introvert would conjure the image of a socially awkward loner who sits slack-jawed in an all-engrossing, single-person activity. These images are stereotypes, and in modern society, introverts may oftentimes feel maligned and deficient. So what exactly is introversion and extroversion? According to...