The personality dimension of introversion-extraversion is well-known, well-researched, and seemingly quite a “visible” personality trait. It is one of the Big Five personality traits ...

A large-scale study by McCrae et al. (2005) analyzed Big Five personality traits across 51 cultures and found significant differences in Extraversion and Introversion scores.

Introversion and extroversion describe how individuals derive their energy and focus their attention. It’s not either/or; there’s actually a spectrum.