A patient is discussing a childhood memory and suddenly forgets what they were saying or completely changes the subject. this person is expressing the psychoanalytic concept of unconscious mind.
Freud (1901) asserted that forgetting is driven rather than the outcome of a lack of learning or other processes. As a sort of ego defense, memories that could cause guilt, embarrassment, shame, or anxiety are deliberately yet unconsciously pushed out of consciousness.
The conscious, preconscious, and unconscious are the three degrees of awareness that Sigmund Freud distinguished between while discussing psychoanalytic theory. These levels all line up with Freud's concepts of the id, ego, and superego and overlap with them.
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