We used Swedish (Danielsson et al., 2019) and German (Randler, 2013) translations of the reduced Morningness-Eveningness Questionnaire (Horne and Östberg, 1976; rMEQ Adan and Almirall, 1991) to assess chronotype. The questionnaire contains five items assessing individual differences in morningness-eveningness preference (“What time would you get up if you were entirely free to plan your day?”). The German version of rMEQ was strongly associated with an alternative measure of chronotype (Composite Scale of Morningness-eveningness) and has shown acceptable internal consistency (α = 0.72; Randler, 2013; α = 0.68 in Danielsson et al., 2019).
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