Empirical test of Vaillant's hierarchy of ego functions.
D000223:Adaptation, Psychological; D000293:Adolescent; D000328:Adult; D003702:Delusions / Q000523:psychology; D003717:Denial, Psychological; D004532:Ego; D006212:Hallucinations / Q000523:psychology; D006801:Humans; D001523:Mental Disorders / Q000523:psychology*; D009289:Narcissism; D010554:Personality Disorders / Q000523:psychology; D011574:Psychoanalytic Theory; D011581:Psychological Tests; D012917:Social Adjustment