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. 2023 Oct 6;17:1232459. doi: 10.3389/fnins.2023.1232459

Table 2.

Hierarchy of ego defenses as ordered by their level of maturity (non-exhaustive list).

Level of maturity Mechanisms Definition
Psychotic Delusional projection Frank delusions about external reality, usually of a persecutory type, with abandonment of reality testing
Perception of one’s own feelings in another person and/or perception of other people or their feelings inside oneself
Distortion Grossly reshaping external reality to suit inner needs (incl. unrealistic megalomaniacal beliefs, hallucinations, wish-fulfilling delusions); usually, unpleasant feelings are replaced with their opposites
Immature Passive-aggressive behavior Aggression toward others expressed indirectly and ineffectively through passivity or directed against the self (e.g., via procrastination)
Acting out Direct expression of an unconscious wish or impulse (e.g., via chronic drug abuse or self-inflicted injury) to avoid (a) being conscious of the affect that accompanies it, and (b) the tension that would result from postponement of instinctual expression
Neurotic Intellectualization Thinking about instinctual wishes in formal, affectively bland terms, and not acting on them; the idea is conscious, but the feeling dismissed
Includes paying attention (1) to the inanimate in order to avoid intimacy with people; (2) to external reality to avoid expression of inner feelings; (3) to irrelevant detail to avoid perceiving the whole
Reaction formation Behavior diametrically opposed to an unacceptable instinctual impulse (e.g., overtly caring for someone else when one wishes to be cared for)
Mature Suppression (Semi-)Conscious decision to postpone (but not avoid) paying attention to a conscious impulse or conflict
Includes looking for silver linings or minimizing acknowledged discomfort
Sublimation Indirect or attenuated expression of instincts without either adverse consequences or marked loss of pleasure (e.g., expressing aggression through pleasurable games, sports, and hobbies)
Unlike with neurotic defenses, instincts are channeled rather than dammed or diverted

Adapted from Vaillant (1977). Less mature defenses distort reality more severely and are therefore more costly to the adaptability of the ego. A mature character allows the ego to flexibly recruit defenses from all levels; a less mature character confines the ego to low-level defenses.