What Is Freud's Psychoanalytic Theory?

Sigmund Freud was Austrian psychiatrist and is known for his following theories.

1. Theory of unconscious mind.
2. Theory of defense mechanism of repression.

He also invented psychoanalysis for treatment of psychopathology through dialogue. He has also redefined the libido as primary motivational energy for human. For more details about his theories visit Sigmund Freud.