Eysenck Personality Inventory

Eysenck's Test Results

Extraversion (84%) very high which suggests you are overly talkative, outgoing, sociable and interacting at the expense too often of developing your own individual interests and internally based identity. Neuroticism (60%) moderately high which suggests you are worrying, insecure, emotional, and anxious. Psychoticism (41%) moderately low which suggests you are, at times, overly kind natured, trusting, and helpful at the expense of your own individual development (martyr complex).

Three dimensions of personality: Extraversion, Neuroticism & Psychoticism.

During 1940s Eysenck was working at the Maudsley psychiatric hospital in London. His job was to make an initial assessment of each patient before their mental disorder was diagnosed by a psychiatrist. Through this position he compiled a battery of questions about behavior, which he latter applied to 700 soldiers who were being treated for neurotic disorders at the hospital (Eysenck (1947).

He found that the soldiers's answers seemed to link naturally with one another, suggesting that there were a number of different personality traits which were being revealed by the soldier's answers. He called these first order personality traits.

He used a technique called factor analysis. This technique reduces behavior to a number of factors which can be grouped together under separate headings, called dimensions.

Eysenck (1947) found that their behavior could be represented by two dimensions: Introversion / Extroversion (E); Neuroticism / Stability (N). Eysenck called these second-order personality traits. 

source: http://www.simplypsychology.org/personality-theories.html