What is your personality: pessimistic, optimistic, envious or confident?

A study on human behavior recently published in the journal Science Advances by researchers at the Carlos III University of Madrid with colleagues from the Universities of Barcelona, ​​Rovira i Virgili and Zaragoza reveals that 90% of the population can be classified into four basic personality types: optimistic, pessimistic, confident and envious. However, the latter pattern, envious, is the largest, with 30% compared to 20% of each of the remaining groups. Sep 16, 2016