MMPI Scales for measuring Eysenck's personality factors
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Updated: Jul 28, 2026

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
Published on: August 18, 2020
T A Gentry1, J A Wakefield, A F Friedman
1California State College, Stanislaus, USA.
Abstract:
Four new MMPI Scales were constructed to identify Eysenck's personality factors of psychoticism, extraversion, and neuroticism as well as a lie score. The scales showed good construct validities against the Eysenck Personality Questionnaire and the Friedman Overlap Scales developed from items in the MMPI. The study also supported the construct validity of the Friedman overlap scales.
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