The personality theories among the humans. Extraversion is the concept about the extroverts that these people are active, with to-do approach, they are active and they like to be with other people, they are outgoing and expressive about everything. Extroverts are charged and motivated when they are around the people. While Introversion is the phenomenon of the introverts who are pretty low and they like to spend time all by themselves. They are motivated by their own ideas and they like to stay in their own's self.
Diagrams
Originated from/Coined by
Carl Jung
Further Reading/ References
https://en.wikipedia.org/wiki/Extraversion_and_introversion