Psychoticism
Psychoticism is one of the three traits used by the psychologist Hans Eysenck in his outdated P–E–N (psychoticism, extraversion and neuroticism) model of personality. Psychoticism includes the traits of "aggression, coldness, egocentrism, impulsivity, lack of empathy, tough-mindedness, and being antisocial." == Nature == Psychoticism is conceptually similar to the constraint factor in Tellegen's three-factor model of personality.