The Study of the Validity and Reliability of the dark personality scale in students

Subject Areas : Tectonostratigraphy

A. Ghomrani ¹ (استادیار گروه روانشناسی و آموزش کودکان با نیازهای خاص، دانشگاه اصفهان)
M. Samadi ² (دانشجوی دکتری روانشناسی و آموزش کودکان با نیازهای خاص، دانشگاه اصفهان)
M. Taghinejad ³ (دانشجوی دکتری روانشناسی و آموزش کودکان با نیازهای خاص، دانشگاه اصفهان)
A. Shamsi ⁴ (کارشناس ارشد روانشناسی و آموزش کودکان با نیازهای خاص، دانشگاه اصفهان)

Received: 2015-11-09 Accepted : 2015-11-09 Published : 2015-08-23

Keywords: validity, Reliability, dark personality,

Abstract :

Background: The aim of this research was to study the validity and reliability of the dark personality scale - the form of 12 questions (Jonason& Webster,2010) in a group of Medical Sciences University students (80 females and 65 males). The validity of the scale was evaluated with item - total correlations(item analysis), subtests correlated with total scores and factor analysis. Scale reliability by Cronbach’s alpha and split - half reliability. Results: The correlation of items with total score (0/22 to 0/80) and sub-test with total score (0/75 to 0/83) was significant in all cases (p<0/01). The factor analysis showed three factors Machiavellianism, psychopath and narcissism, which in total explained 63% of variance of dark personality. The Cranach’s alpha coefficients for Machiavellianism, psychopath and narcissism and total scores were obtained 0/92, 0/40, 0/68 & 0/81. The split - half reliability coefficients of Scale was estimated 0/78. Also there was no significant difference between males and females in terms of dark personality. Conclusion: Overall, the results of this study indicated that the scale of dark personality to disease had a good psychometric quality for assessing component of dark personality in Iran.

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