Type theories advocate that human potentialities can be classified into a few clearly defined types and each person can be described as belonging to a certain type.
Greek physician, Hippocrates gave a classification on the basis of dominant fluids. According to him, the human body consists of four types of humors or fluids — blood, yellow bile, phlegm (mucus) and black bile. The predominance of one of these four types of fluids in one’s body gives him unique temperamental characteristics leading to a particular type of personality classification is as follows
Sanguine personality (Blood : Predominant fluid in the body): Light hearted, carefree, optimistic, easy-going, hopeful, accommo-dating, happy, responsive, sociable, talkative, lively, has leadership qualities.
Choleric personality (Yellow bile : Predo-minant fluid in the body) : Irritable, restless, aggressive, impulsive, excitable, active, angry but passionate, strong with active imaginatic , touchy, flexible.
Phlegmatic personality: (Phlegm/Mut c : Predominant fluid in the body): calm, tempered, controlled, reliable, slow/sluggish, indifferent, thoughtful, peaceful, passive, careful.
Melancholic personality (Black bile : Pre-dominant fluid in the body): Pessimistic, rigid, unsociable, bad-tempered, sad, deplorable, self-involved, dejected, anxious, moody, reserved.
