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Objective: Chronotype refers to the time of the day that a person’s physical functions and cognitive functions are active. Simply this is a circadian phase preference of a person. The study of circadian rhythms, known as chronobiology, is all about the differences between chronotypes: ‘larks’ (so called morning people) and ‘owls’ (or night people). A few tests are used to determine chronotypes. The CCTQ is a parent-report, 27-item mixed format questionnaire measuring chronotype of children in multiple domains: the midsleep point on free days (MSF), a morningness/eveningness scale (M/E) score, and a five-point chronotype (CT) score. The aim of this study is adaptation of Children’s Chronotype Questionnaire (CCTQ) into Turkish Language and validating the instrument in Turkish population.
Method: 101 children, aged nine through eighteen constituted the sample of the study. We compared the CCTQ and MESC scores of children to examine the validity of CCTQ. To assess the test/retest reliability, we also wanted the parents to re-fill the test 15 days after the first application.
Results: The internal consistency and external validity of the Turkish CCTQ was sufficient to compare MESC-Turkish. As a result of this research carried out in accordance with methodological research principles, correlation between the M/E scores of CCTQ and MESC was significant.
Conclusion: The Turkish version of CCTQ has been found to be valid and reliable in Turkish children.