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Personality: Self concept · Personality testing · Theories · Mind-body problem

Psychoanalysis theories explain human behaviour in terms of interaction between the various components of personality. Sigmund Freud was the founder of this school. Freud drew on the physics (thermodynamics) of his day to coin the term psychodynamics: based on the popular ideas of conversion of heat into mechanical energy and vice versa, he proposed the conversion of psychic energy into behaviour. He broke the human personality down to three significant components: the ego, superego, and id. According to Freud, personality is shaped by the interactions of these three components.

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