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"Some other thoughts: - It's super important that you know that the concept of introvert/extrovert is pseudo science, same for "left-brained" / "right-brained"(Ex. https://www.inc.com/joshua-spodek/there-are-no-such-things-a...

The article does not offer any citations, and does not discuss the history of the concepts of introversion and extroversion. Even the most basic search reveals that the concept of extraversion is one of the factors of the Big Five personality model, the most influential model of personality that psychology has (https://en.wikipedia.org/wiki/Big_Five_personality_traits). There are literally thousands of studies that have used this model.