Science Says There Are Only 4 Personality Types—Which One Are You?

As human beings, we like to think that we’re all unique, special snowflakes, and that there’s no one out there who’s quite like us. In many ways, that’s true; no one has your exact combination of genetics, life experiences, and general characteristics… or do they? We may have more in common with each other as people than we’d like to admit—according to a new study, there are only four types of people in the world. Say what?

Research performed by Northwestern’s McCormick School of Engineering and published in Nature Human Behavior revealed that there are four main personality types, a discovery which was determined after studying personality test answers from 1.5 million people. Do any of these sound like you?


Pretty self-explanatory—reserved personality types tend to be meeker, soft-spoken, and more hesitant to share their thoughts and feelings or step up as leaders in any given situation. They tend to have fewer neuroses but are more introverted and agreeable.


Again, no big surprises here. Those with the self-centered personality type care less about other people’s thoughts and feelings and often don’t consider them in their decision-making. They tend to be extreme extroverts who are less open and agreeable than other types.

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Role model

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By the name, you might assume more people have this personality type than any other, and that’s likely the case. Average people tend to be highly neurotic and pretty extroverted while managing to keep a distance from people around them.

Researchers are unsure whether these findings will become markers of personality assessment in future, but they do stress that there are intricacies to consider, such as the fact that personality types change as we get older and that there are varying levels of neuroticism, extroversion, etc.

If you want to take their test and find out which category you fall into, you can do so here.

Jennifer Still is a writer and editor with more than 10 years of experience. The managing editor of Bolde, she has bylines in Vanity Fair, Business Insider, The New York Times, Glamour, Bon Appetit, and many more. You can follow her on Twitter @jenniferlstill