The world’s most widely-used personality test isn’t relevant for much of the world. (Credit: By Gustavo Frazao / Shutterstock)

A lot of contemporary psychology research is based on the assumption that there are five basic dimensions of personality that define people around the world.

It’s called the “Big Five” personality model, and it assumes that each of our personalities are a unique blend of a handful of traits: extraversion, agreeableness, openness, conscientiousness and neuroticism.