There are four types of personality types: reserved, role models, average and self-centered. That’s according to a new article published in the journal Nature Human Behavior.

The findings were based on new data gathered by scientists at Northwestern University in Illinois. Researchers surveyed 1.5 million people, who were asked more than 250 questions.

The algorithm examines character traits in order to assess which of the four personality types a person has. The types include average, a role model, self-centered or reserved.  

Average people are described as neutral and agreeable. 

Role models are good leaders and dependable people. 

The self-centered type lack openness and are less conscientious of others. 

Reserved people are described as emotionally stable and somewhat agreeable. 

Which personality type are you? Take the quiz here.