EVANSTON, Ill. --- Northwestern University researchers have sifted through data from more than 1.5 million questionnaire respondents and found at least four distinct clusters of personality types ...

Data collected from your smartphone usage patterns can be used to predict four of your Big Five personality traits, according to new research from Princeton University. The Big Five model, also known ...

The Greek physician Hippocrates argued that four bodily “humors” shaped human behavior, which, in turn, resulted in four fundamental personality types. Today, people put more faith in Myers-Briggs ...

Some people believe personality is fixed, but more recent research suggests that personality may develop over time and that people’s personality traits can change. Personality types group people into ...

People love taking personality tests, but are personality types real? Maybe, and maybe not. Personality development is complicated, and most healthy personality types are not so easily defined. Your ...