Structure of personality: eusenck employed factor analysis to idenify super traits, all traits can be subsumed within three basic personality dimensions. 9. 1 eysenck"s hierachical model of personality speciic responses are ied to habitual response levels: the further you go down the more personal you get (speciic responses) Eysenck divided the elements of personality into units that can be arranged hierarchically: basic structure- speciic response level. Iniial factor analyic research yielded in two basic dimensions: extraversion- introversion, neuroicism. Personality dimensions are independent of one another: 9. 2 traits associated with eysenck"s two major personality dimensions. Introverts are quiet, introspecive, reserved, and distant except with inimate friends. People high on neuroicism are unstable or highly emoional, easily upset, and angered. Individuals low on neuroicism are less prone to emoional swings. Psychoicism- third supertrait found by eysenck: people on the high end of psychoicism are egocentric, aggressive, and impersonal.