By Juliet Soh

The “four temperaments” is a medical theory derived thousands of years ago that has also been used as a way to classify personality types. Ancient Greek medicine believes that illnesses are caused by an imbalance in four different bodily fluids: blood, yellow bile, black bile and phlegm. According to the theory, our traits and behaviours are also governed by these bodily fluids, and we can thus be classified into four types: Sanguine, Choleric, Melancholy and Phlegmatic. Most people are a mixture of all four, in different percentages. Wonder which type you (and your boss and colleagues!) are? Do this simple quiz to find out.