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Depression Research and Treatment
Volume 2011, Article ID 731307, 6 pages
Research Article

The Relationship between Individual Personality Traits (Internality-Externality) and Psychological Distress in Employees in Japan

1Division of Psychiatry, Akita Prefectural Mental Health and Welfare Center, 2-1-51 Nakadori, Akita City, Akita Prefecture 010-0001, Japan
2Division of Psychiatry, Akita Occupational Health Promotion Center, Akita 010-0874, Japan

Received 27 February 2011; Revised 13 May 2011; Accepted 1 June 2011

Academic Editor: Jörg Richter

Copyright © 2011 Masahito Fushimi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study examines the relationship between the internality-externality (I-E) scale as an indicator of coping styles and the Kessler 6 (K6) scale as an indicator of psychological distress and analyzes the effects of sociodemographic and employment-related factors on this relationship. Employees from Akita prefecture in Japan were invited to complete self-administered questionnaires. A uniform pattern of findings emerged in the relationship between the two scales as follows: all the significant correlations were negative, that is, as the I-E score increased, the K6 score decreased. Furthermore, significant effects were observed for the I-E scale regarding sex, age, education, employee type, and employment status and the K6 scale with multiple regression analyses. Among these, the effect of the K6 scale was significant for the I-E scale in both males and females. The results of this study may help improve mental health clinicians' understanding of psychological distress in employees.