The terms "introvert" and "extravert" (note the proper spelling with a rather than o) were originally introduced by Swiss psychiatrist C.G. Jung in his now classic text Psychological Types (1921).

Carl Jung’s statement draws a sharp contrast between external attention and internal reflection. Looking outward, he suggests ...

An extrovert is a person who gains energy from interacting with people. They tend to do group activities and seek new sensations, but they may find it difficult to be alone for long periods. The ...