Psychometric Properties of the Turkish version of the Morningness - Eveningness Stability Scale improved (MESSi) in Adolescents

ABSTRACT

Morningness–Eveningness Stability Scale improved (MESSi) is an assessment tool that evaluates distinctness of daily changes as well as the person’s propensity for morningness and eveningness. The aim of this study is to evaluate psychometric properties of the Turkish version of MESSi and associations of chronotypes and diurnal variations with personality, affect, sleep quality as well as validity of the scale in Turkish adolescents. The sample of this study consisted of 445 students between ages of 10–19. Participants filled in MESSi, Morningness/Eveningness Scale for Children, Composite Scale of Morningness, Personality Traits Scale (BIG-5), Positive and Negative Affect Scale (PANAS), Pittsburgh Sleep Quality Index (PSQI). Reliability analysis of the scale showed quite reliable internal consistency values. Confirmatory factor analysis (CFA) was used to test construct validity of three-factor model of MESSi. An acceptable model fit was demonstrated in CFA. There was a moderate and significant relationship between MA and DI subscale scores of MESSi. A moderate but negative correlation was found between MA and EV subscale scores of MESSi. MA and DI subscale scores of MESSi were found to be weakly correlated with conscientiousness, emotional stability, openness to experience and subscale scores of BIG-5, respectively. There was a positive correlation of positive affect subscale scores of PANAS with MA and DI subscale scores of MESSi. MA subscale scores of MESSi were found to be negatively correlated with scores of subjective sleep quality, latency, duration, disturbances, habitual sleep efficiency, daytime dysfunction, and global scores of PSQI. This study shows that Turkish version of MESSi is valid and reliable for use in adolescents. Three-factor MESSi provides an advantage over other chronotype scales in adolescence since it includes DI subscale as well as MA and EV subscales. Psychometric results were supported by other chronotype scales and clinical features such as sleep, affect, and personality.

KEYWORDS:

• MESSi
• morningness
• eveningness
• circadian preference
• personality
• sleep quality

Acknowledgements

The authors would like to acknowledge Uğur Doğan, Eda Demirhan, Şenol Beşoluk and the support of all the Erzincan Guidance and Research Center team members in Erzincan, Turkey.

Disclosure statement

The authors all affirm that they have no conflicts of interest to disclose.

Ethics

The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committee on human experimentation with the Helsinki Declaration of 1975, as revised in 2008. Ethical approval was received, the details were in methodology.

Additional information

Funding

This research received no specific grant from any funding agency, commercial or not-for-profit sectors.