An individual could be any combination of the following four types. Examples are Most individuals tend to have aspects of their personality which identify with each of the four temperaments. The Colour Works organisation, for example, runs a course focusing on the four temperaments as their core productThis article is about the "four humours" in Greco-Roman medicine, a specific form of the more universal proto-medical concept of However, there are usually one or two primary temperaments that are displayed at a significantly higher level. Temperament theory has its roots in the ancient theory of Modern medical science has rejected the theories of the four temperaments, though their use persists as a metaphor within certain psychological fields.Other researchers developed similar systems, many of which did not use the ancient temperament names, and several paired extraversion with a different factor which would determine relationship and task-orientation. Most formulations include the possibility of mixtures among the types where an individual's personality types overlap and they share two or more temperaments. The four temperament theory is a proto-psychological theory which suggests that there are four fundamental personality types: sanguine, choleric, melancholic, and phlegmatic. Greek physician Hippocrates (c. 460 – c. 370 BC) described the four temperaments as part of the ancient medical concept of humourism, that four bodily fluids affect h… The four temperaments have also been picked up by management training and consulting firms as a way of helping people to understand their colleagues.