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ego (e´go)   in psychoanalytic theory, one of the three major parts of the personality, the others being the id and the superego. The ego is represented by mental mechanisms such as perception and memory, and by specific defense mechanisms that are used to adjust to the demands of primitive instinctual drives (the id) and the demands of the external world (superego). The ego may be considered the psychologic aspect of one's personality, the id comprising the physiologic aspects and the superego the social aspects.




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