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Fakultäten » Philosophische Fakultät » Psychologisches Institut » Persönlichkeitspsychologie und Diagnostik » Prof. Dr. Willibald Ruch » Ruch

Completed research project

Title / Titel Fifty years of Eysenck personality scales: A comprehensive psychometric analysis of the PEN-System
PDF Abstract (PDF, 14 KB)
Summary / Zusammenfassung The superfactors of the PEN model of personality, Neuroticism (N), Extraversion (E), and Psychoticism (P) have been successively established during the second half of past century and inventories to their measurement have been developed. The claimed continuity in the line of development was demonstrated for successors (with the possible exception of the latest--the Eysenck Personality Profiler), but rarely for nonconsecutive instruments, and often critics doubted the identity of trait operationalisations. The present project examines the claimed identity of the superfactors in all assessment instruments available by simultaneously administering all published scales as well as several adjective lists (representing markers of the PEN model) to a sample of adults. Special attention is given to the stages in the normalizing of psychometric P in normals. Both concepts Psychoticism (P) and Neuroticism (N) were originally developed in the study of psychiatric patients and later deamplified to make it applicable to normals. For N this transition was made between the MMQ and the MPI, but there were more steps in the development of the P-scale (PI, PEN, EPQ, EPQ-R, EPP), and P in the EPQ-R is still on the "tough" side. Thus, the present project examines the different stages in the "softening" of P, using Eysenck's (1992) model as a reference, and the simultaneous application of all published P-items, together with a list of prototypical trait adjectives. Furthermore, special attention will be given to the analysis of the Eysenck Personality Profiler (EPP). While this questionnaire claims to assess the Eysenckian superfactors Extraversion, Adventurousness (Psychoticism), and Neuroticism, as well as seven facets for each of the superfactors, the postulated model has only been demonstrated imperfectly so far by exploratory and confirmatory factor analysis. Finally, the relationship between the PEN-system and the five factor model (FFM) of personality will be examined using the NEO-PI-R as a measure fort he FFM.
Publications / Publikationen Ruch, W. (2005). Fünf Dekaden Eysenck-Inventare im Zeitraffer: Eine psychometrische Analyse von Fragebogenmarkern des PEN-Modells. Referat gehalten an der 8. Arbeitstagung der Fachgruppe für Differentielle Psychologie, Persönlichkeitspsychologie und Psychologische Diagnostik, Philipps-Universität Marburg, 26. und 27. September.

Ruch, W., & Proyer, R. T. (2009). Who fears being laughed at? The location of gelotophobia in the PEN-model of personality. Personality and Individual Differences, 46, 627-630. doi:10.1016/j.paid.2009.01.004

Schreiber, M. & Ruch, W. (2005). Das PEN-Modell - Konvergente (und divergente) Validität verschiedener Erfassungsinstrumente. Poster präsentiert an der 8. Arbeitstagung der Fachgruppe für Differentielle Psychologie, Persönlichkeitspsychologie und Psychologische Diagnostik, Philipps-Universität Marburg, 26. und 27. September.

Schreiber, M. & Ruch, W. (2005). PEN versus BIG FIVE - The relation between two personality models. Poster presented at the 9th Congress of the Swiss Society of Psychology, University of Geneva, september 29th - 30th.

Keywords / Suchbegriffe PEN System, Extraversion, Neuroticism, Psychoticism, EPQ-R
Project leadership and contacts /
Projektleitung und Kontakte
Prof. Dr. Willibald Ruch (Project Leader) w.ruch@psychologie.uzh.ch
Dr. Marc Schreiber Marc.Schreiber@access.uzh.ch
Funding source(s) /
Unterstützt durch
Other Public Sources (e.g. Federal or Cantonal Agencies), Others
unterstützt durch Deutsche Forschungsgemeinschaft DFG
Duration of Project / Projektdauer Jan 2005 to Dec 2006