In 1913, Swiss psychologist Carl G. Jung first proposed the introversion type of personality.
Jung believed that people’s psychology can be divided into two tendencies when it comes to connecting with the world around them, called ‘sets.’
One kind of orientation points to the internal world of an individual, which is called introversion; the other kind of orientation points to the external environment, which is called extroversion.
This division method can be regarded as the most basic type of human personality.
Extraversion and introversion can often be measured through self-tests.
