Primary Traits of Eysenck's P-E-N System: Three- and Five-Factor Solutions

Paul T. Costa, Robert R. McCrae

Research output: Contribution to journalArticlepeer-review

185 Scopus citations


The Eysenck Personality Profiler (EPP), a set of 21 scales measuring primary traits hypothesized to be definers of Neuroticism, Extraversion, and Psychoticism factors, was administered to 229 adults together with the Eysenck Personality Questionnaire-Revised (H. J. Eysenck & S. B. G. Eysenck, 1991) and the Revised NEO Personality Inventory (NEO-PI-R; P. T. Costa & R. R. McCrae, 1992b). Correlations of EPP scales with NEO-PI-R facet scales provided preliminary evidence supporting the convergent and discriminant validity of the EPP scales. However, varimax and targeted validimax factor analyses suggested that some EPP scales were misclassified and that EPP scales could better be understood in terms of the 5-factor model than the intended 3-factor model.

Original languageEnglish (US)
Pages (from-to)308-317
Number of pages10
JournalJournal of Personality and Social Psychology
Issue number2
StatePublished - Aug 1995
Externally publishedYes

ASJC Scopus subject areas

  • Social Psychology
  • Sociology and Political Science


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