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Psychometric Properties of the Turkish Version of the Composite Scale of Morningness

Published online by Cambridge University Press:  07 August 2013

İsmail Önder ,
Şenol Beşoluk  and
Mehmet Barış Horzum
İsmail Önder*
Affiliation:
Sakarya University (Turkey)
Şenol Beşoluk
Affiliation:
Sakarya University (Turkey)
Mehmet Barış Horzum
Affiliation:
Sakarya University (Turkey)
*
*Correspondence concerning this article should be addressed to İsmail Önder. Sakarya Üniversitesi Eğitim Fakültesi 54300. Hendek, Sakarya (Turkey). Phone: +902-642957169. Fax: +902-646141034. E-mail: ionder@sakarya.edu.tr
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Abstract

The Composite Scale of Morningness is widely used and translated into several languages. The aim of the study was to present psychometric properties of Turkish version of CSM based on a sample of high school and university students. A total of 543 high school and 650 university students have participated in to the study. The internal consistency coefficient was found to be .73 (high school) and .80 (university). The test-retest reliability of the scale was .89 in high school sample and .84 in university sample. The mean CMS scores did not differ by gender in both samples. Exploratory and confirmatory factor analysis revealed that the scale is valid. As an external validation, morningness was associated with MEQ scores, sleep length, mid-point of sleep, rising and retiring time. The data obtained in the study suggested that the Turkish version of the CSM is a reliable and valid instrument to assess circadian preference in both high school and university samples.

Keywords

chronotypecircadian preferencemorningnessadaptationreliability and validity
Type
Research Article
Information
The Spanish Journal of Psychology , Volume 16 , 2013 , E67
Copyright
Copyright © Universidad Complutense de Madrid and Colegio Oficial de Psicólogos de Madrid 2013 

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Footnotes

We are grateful to the students who participated in this study. This study was supported by the Research Fund of the Sakarya University (Project Number: 2012-06-01-001).

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