Psychometric Properties of the Persian Version of Type D Personality Scale (DS14)

authors:

avatar Reza Bagherian 1 , * , avatar Hadi Bahrami Ehsan 2

Behavioral Sciences Research Center and Department of Psychiatry, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
Associate Professor, Department of psychology, University of Tehran, Tehran, Iran
Iranian Journal of Psychiatry and Behavioral Sciences: Vol.5, issue 2; 12-7
published online: December 31, 2011
article type: Original Article
received: April 30, 2010
accepted: August 20, 2011

How To Cite Bagherian R, Bahrami Ehsan H. Psychometric Properties of the Persian Version of Type D Personality Scale (DS14). Iran J Psychiatry Behav Sci. 2011;5(2): 12-7. 

Abstract

Objective: Type D personality is based on negative affectivity (NA) and social inhibition (SI). The purpose of this study was to examine the reliability and validity of the Persian version of 14-item Type D personality scale (DS14).
Methods: The study included 191 normal participants and 176 patients with myocardial infarction (MI). They all filled out the Persian version of DS14, containing 7-item NA and SI subscales; 71 normal subjects completed the neuroticism and extroversion subscales of Eysenck questionnaire. Besides, 71 participants filled out the DS14 twice over a 2-month period.
Results: In this study, 35.8 % of MI patients and 24.6% of healthy people were classified as Type D. Factor analysis of Persian version of DS14 yielded the two-factor structure; all of the NA and SI items loaded between 0.65 to 0.80 in patients and 0.48 to 0.79 in healthy people on their corresponding factor. Test–retest stability of the NA and the SI subscales were 0.86 and 0.77 respectively over a 2-month period. High internal consistency of Cronbach's alpha coefficient has been found to be 0.84 in patients and 0.87 in healthy people for the NA subscale and 0.86 in patients and 0.75 in healthy people for the SI sub-scale. The construct validity of NA and SI sub scales were confirmed against neuroticism (r = 0.65) and extroversion (r = -0.62) subscales of Eysenck questionnaire respectively.
Conclusion: Persian version of DS14 is an acceptable, reliable and valid measure of dimensions of Type D personality.
Declaration of Interest: None.
Citation: Bagherian R, Bahrami Ehsan H. Psychometric properties of the persian version of Type D Personality Scale (DS14). Iran J Psychiatry Behav Sci 2011; 5(2): 12-7

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