Validity and Reliability of the Turkish Version of the Munich Chronotype Questionnaire

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OBJECTIVE: The Morningness-Eveningness Questionnaire (MEQ) has been widely used to determine chronotype. The Munich Chronotype Questionnaire (MCTQ) was developed as an alternative measurement tool to the MEQ, focusing on different sleep behaviors on work and free days. The aim of this study was to adapt the MCTQ to the Turkish language and to validate the questionnaire on young and healthy adult members of the Turkish population. METHOD: This study was conducted with total of 214 (161 Female, 53 Male) healthy young adult volunteers between the ages of 18-30 (M=20.72, SD=2.33) from Hacettepe University. After adaptation to the Turkish language to form the MCTQ-TR, the psychometric properties were compared with the MEQ-TR. The test retest reliability of the MCTQ-TR was investigated on 25 participants (19 Female, 6 Male), 4 months after the first application. RESULTS: The test-retest reliability coefficient of the MCTQ-TR was calculated as r=0.643 (p<0.05). The validity and reliability results indicated a negative and statistically significant correlation between the MEQ-TR and MCTQ-TR scores (r=-0.627; p<0.001). CONCLUSION: The MCTQ-TR is a valid and reliable measurement tool that can be used to determine chronotype in healthy Turkish young adult population.