Although Hippocrates' theory of personality traits was speculative, many of his terms such as choleric, sanguine, melancholic are still used in descriptions of personality today.

Hippocrates' Theory

A historical perspective on medicine that attributed health and disease to the balance of bodily fluids, introduced by the ancient Greek physician Hippocrates.

Personality Traits

Enduring characteristics or behaviors that define an individual and differentiate them from others.

Choleric

Relating to one of the four temperaments characterized by quickness to anger and bad temper.