Hippocrates (460–377 BC) postulated that the imbalance or excess of four fluids (called humors) within the body play a role in ones emotional and physical state. The chart below shows the four humors (row 1), the condition created by too much of each (row 2), and their respective emotions (row 3):


The Hippocratic theory of personality popularized the practice of bloodletting — opening a vein or applying leeches to "drain off" excessive amounts of the troublesome humor. In medieval Europe, it was common for barber-surgeons (whose professional practice relied on sharp instruments like knives and razors) to advertise their bloodletting services by posting a sign depicting a pale human arm traced with a crimson spiral of blood. (Remember that a ...

Could the most widely used personality questionnaire simply be a farce?

In case you don't know, the Myers-Briggs test is an assessment test believed by many to measure psychological preferences in how they perceive things and help them in making decisions. According to the Myers-Briggs test, there exist sixteen different types of personalities. This Myers Briggs Test has a series of questions that require your answers, which in turn determine the type of personality you have and provides you with general assumptions concerning how your personality type best suits you.

Back in year-3 of my undergrad., I had to spend $20 to take the test for an assignment I had to write. While it was interesting to note how my personality could be read throug ...