Encyclopedia of Clinical Neuropsychology

2011 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan

Eysenck Personality Inventory

  • Angela M. Bodling
  • Thomas Martin
Reference work entry
DOI: https://doi.org/10.1007/978-0-387-79948-3_2025




The Eysenck Personality Inventory (EPI) is a self-report instrument designed to measure two central dimensions of personality, extraversion and neuroticism. This instrument is comprised of 57 yes/no items and yields total scores for extraversion and neuroticism as well as a validity score (e.g., Lie Scale). Individuals are generally classified as “high” or “low” on the two dimensions. Persons high in extraversion are seen as social, carefree, and optimistic, while low scorers are generally quiet, introspective, and reserved. Individuals classified as high in neuroticism are prone to emotional distress/instability, while those low in this dimension are generally calm and emotionally stable.

Current Knowledge

Test Theory, Development, and Properties

The EPI was developed in 1964 based on a conceptualization of personality that identifies extraversion and neuroticism as the two primary and independent factors comprising the global construct of personality. The...

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References and Readings

  1. Bryant, R. A., & Harvey, A. G. (1998). Predictors of acute stress following mild traumatic brain injury. Brain Injury, 12(2), 147–154.PubMedGoogle Scholar
  2. Eysenck, H. J., & Eysenck, S. B. G. (1964). Manual of the eysenck personality inventory. London: University of London Press.Google Scholar
  3. Francis, L. J., Brown, L. B., & Philipchalk, R. (1992). The development of an abbreviated form of the revised Eysenck Personality Questionnaire (EPQR-A): Its use among students in England, Canada, the U.S.A. and Australia. Personality and Individual Differences, 13(4), 443–449.Google Scholar
  4. Malec, J. (1985). Personality factors associated with severe traumatic disability. Rehabilitation Psychology, 30(3), 165–172.Google Scholar
  5. Wang, H. X., Karp, A., Herlitz, A., Crowe, M., Kareholt, I., Winblad, B., et al. (2009). Personality and lifestyle in relation to dementia incidence. Neurology, 72, 253–259.PubMedGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Angela M. Bodling
    • 1
  • Thomas Martin
    • 2
  1. 1.Center for Health Care QualityUniversity of Missouri—ColumbiaColumbiaUSA
  2. 2.University of Missouri—ColumbiaColumbiaUSA