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Original Article



Reliability, Validity, and Psychometric Properties of the Greek Translation of the Cambridge Depersonalization Scale (CDS)

Konstantinos Kontoangelos, Sofia Tsiori, Garyfalia Poulakou, Konstantinos Protopapas, Ioannis Katsarolis, Vissaria Sakka, Dimitra Kavatha, Antonios Papadopoulos, Anastasia Antoniadou, and Charalambos.C. Papageorgiou.


Abstract

Introduction: The Cambridge Depersonalisation Scale is meant to capture the frequency and duration of depersonalisation symptoms over the ‘last 6 months’. Methods: In order to develop a Greek version of CDS scale, the CDS scale was translated in Greek by 2 psychiatrists. Then, the Greek version of CDS scale was back-translated by a person who did not knew the original English version. The back-translated version was reviewed in order to establish whether is consistent with the original English version. After this procedure we administered the Greek version of CDS scale to a sample of 294 Greeks in order to assess the reliability and the validity of the Greek version of scale. Results: The five components solution accounted for 58.204% of the total variation. Initial eigenvalues of the five components were: factor 1=11.555, factor 2=1.564, factor 3=1.356, factor 4=1.247 and factor 5=1.157. Six items did not load on any factor. Correlations between factors were low ranged from 0.134 to 0.314 and no complex variables were found. Cronbach’s alpha and Guttman split-half coefficient were used to evaluate interval consistency of CDS scale in 294 individuals. The alpha coefficients and Guttman split-half coefficient of the CDS scale were 0.938 and 0.921, respectively. The test-retest reliability proved to be satisfactory. The intraclass correlation coefficients for the total CDS score was very good and equal to 0,883. The CDS scale correlated highly with the SCL-90 and all subscales (p-value

Key words: Cambridge depersonalization Scale, CDS, depersonalization, reliability, validity, HIV.






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