Final answer:
Psychoanalytic Theory is the fundamental concept in Sigmund Freud's theory of personality development, emphasizing the importance of resolving psychosexual stages for healthy development.
Explanation:
Psychoanalytic Theory is the name of Sigmund Freud's basic theory of the human personality. Freud's theory posits that personality develops through a series of psychosexual stages, with each stage focusing on pleasure from a specific erogenous zone. Failure to resolve these stages can lead to fixation and unhealthy personality traits.
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