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A hierarchy of items within Eysenck's EPI

Watson, Roger; Roberts, Beverly; Gow, Alan; Deary, Ian


Beverly Roberts

Alan Gow

Ian Deary


Based on the recent finding of a hierarchical scale for Neuroticism in the NEO-Five Factor Inventory, a further personality inventory: the Eysenck Personality Inventory was analysed using the Mokken Scaling Procedure for hierarchical scales. Items from two dimensions of the Eysenck Personality Inventory – Neuroticism and Extraversion – produced reliable hierarchical scales of 12 and five items, respectively, for all subjects but only a scale for Neuroticism for males and females separately. The Neuroticism items ran from items expressing mild to more extreme worry and a single hierarchical scale for Neuroticism, usable with males and females, is suggested. The utility of hierarchical scales in personality measurement is discussed in terms of furthering the theoretical understanding of personality traits and also their practical applications.


Watson, R., Roberts, B., Gow, A., & Deary, I. (2008). A hierarchy of items within Eysenck's EPI. Personality and individual differences, 45(4), 333-335.

Journal Article Type Article
Acceptance Date Apr 28, 2008
Online Publication Date Jun 10, 2008
Publication Date 2008-09
Print ISSN 0191-8869
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 45
Issue 4
Pages 333-335
Keywords Personality; Eysenck personality inventory; Neuroticism; Mokken scaling; Latent traits; Psychometrics; Item-response theory
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