THE THREE TYPES OF PERSONALITY
Hans Eysenck's theory of criminal personality suggests that personality is biologically based and that personality traits include dimensions of extraversion and neuroticism that can be measured using a personality questionnaire.
PSYCHOTICISM
Psychoticism is a personality pattern typified by aggressiveness and interpersonal hostility. High levels of this trait were believed by Eysenck to be linked to increased vulnerability to psychosis such as in schizophrenia.
NEUROTICISM
Individuals who score high on neuroticism are more likely than average to be moody and to experience such feelings as anxiety, worry, fear, anger, frustration, envy, jealousy, guilt, depressed mood, and loneliness.
EXTRAVERSION
A person who scores high in extraversion on a personality test is the life of the party. They enjoy being with people, participating in social gatherings, and are full of energy. They are talkative, assertive, enthusiastic, and gregarious.