The third dimension of personality eventually proposed by Hans and Sybil Eysenck is that of psychoism versus superego control. People with a high level of psychosis may have these characteristics:
And people with a high level of superego can have the characteristics:
Therefore, Hans and Eysenck's trait theory was based on the individual's temperament, with the first two dimensions being based on extraversion versus introversion and neuroticism versus stability.
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