The theory of personality seeks to explain individual differences in behavior, thoughts, and emotions. There are various perspectives, such as psychodynamic (Freud), humanistic (Rogers), trait (Costa & McCrae), and social-cognitive (Bandura). These theories offer insight into how personality develops, the factors that influence it, and how it shapes our interactions and experiences.

Biological theory of personality assumes that some of the personality traits are transferred through genes. However, there are those that are imposed on people from their surroundings.

Sigmund Freud is widely recognized as the developer of the first comprehensive theory of personality, known as psychoanalytic theory. Freud's theory emphasizes the role of unconscious desires and early childhood experiences in shaping individual personality.

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A theory that identifies six personality types and pripeses that the fit between personality type and occupational environment determines satisfaction and turnover