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Eysenck Personality Inventory

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Encyclopedia of Clinical Neuropsychology




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.

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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

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Bodling, A.M., Martin, T. (2011). Eysenck Personality Inventory. In: Kreutzer, J.S., DeLuca, J., Caplan, B. (eds) Encyclopedia of Clinical Neuropsychology. Springer, New York, NY.

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