THEORIES OF PERSONALITY: Many psychologists have developed theories about personality—how to describe it, how it emerges, what influences it, how it changes, and what constitutes a healthy or an abnormal personality. Here you will learn about the three most important personality theories: psychoanalytic theory, behaviourism and humanism. The first of the modern personality theories was developed by Sigmund Freud and is known as psychoanalytic theory. The psychiatric practice of this theory is called psychoanalysis. Freud’s ideas were plentiful, profound, and often controversial. His theory about personality has had tremendous influence on societies around the world through many different disciplines. Not only psychology has been influenced and informed by the ideas of Freud, but also literature, art, philosophy, cultural studies, film theory, and many other academic subjects. Freud’s theory represents one of the major intellectual ideas of the modern world. Right or wrong, these ...