by H.J. Eysenck & S. B. G. Eysenck
  • Forms: B, A-I
  • Range: High School, College, and Adult
  • Length: 90 items
  • Norms: American College and Adult
  • Administration Time: 10 - 15 minutes for Form A-I or B
  • Scoring Options: Hand-scoring with overlay keys requires about half a minute per form.
  • Language(s): English and Spanish

Measure of Two Major Personality Dimensions in Adults

The Eysenck Personality Inventory (EPI) measures two pervasive, independent dimensions of personality, Extraversion-Introversion and Neuroticism-Stability, which account for most of the variance in the personality domain. Each form contains 57 “Yes-No” items with no repetition of items. The inclusion of a falsification scale provides for the detection of response distortion. The traits measured are Extraversion-Introversion and Neuroticism. A revised form of the EPI is the EPQ-R.

EPI Scales


High E scores indicate extraversion, and individuals who score high tend to be outgoing, impulsive, uninhibited, have many social contacts, and often take part in group activities.

Typically, the extravert is highly social, likes gatherings, has many friends, needs to have people to talk to, and dislikes solitary pursuits such as reading, studying, and contemplation. Instead, the typical extravert prefers excitement, likes to take chances, often acts on the spur of the moment, and generally is quite active. Such a person may be fond of practical jokes and usually has an answer to anything.

By contrast, the introvert tends to be quiet, retiring and studious. The typical introvert is reserved and distant except to intimate friends, tends to plan ahead and usually distrusts acting on impulse. Such persons prefer a well-arranged existence, keep their feelings well controlled, and are more passive than aggressive. Generally reliable although somewhat pessimistic, typical introverts seldom lose their temper and tend to place great value on ethical standards.


High N scores indicate strong emotional lability and overactivity. Persons with high scores tend to be emotionally overresponsive, and encounter difficulties in calming down. Such persons complain of vague somatic upsets, and report many worries, anxieties, and irritating emotional feelings. They may develop neurotic disorders when under stress, which fall short of actual neurotic collapses. High scores do not preclude such persons functioning adequately in family and work situations.


EPI Materials

Item Code & Quantity Price
EPI Inventories- Form B EPI-AHS-025-B
EPI Inventories- Form A-I EPI-AHS-025-I
Hand-Scoring Keys EPI-KEY $ 13.75
Manual EPI-MAN $ 6.75
Specimen Set (includes one copy of all forms and Manual) EPI-SPC $ 12.25

If you like the Eysenck Personality Inventory (EPI) try these other assessments.