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Composite Scale of Morningness: Psychometric properties, validity with Munich ChronoType Questionnaire and age/sex differences in Poland
Morningness Scale: reliability, agreement with sleep timing, and age/sex differences in Poland
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Abstract
A sample of 952 Polish residents demonstrated good reliability of the Composite Scale of Morningness (CSM) with a Cronbach's alpha of 0.84.
- The Composite Scale of Morningness (CSM) showed a correlation of r=-.52 with mid sleep on free days (MSF) from the Munich ChronoType Questionnaire (MCTQ).
- MSF from the MCTQ was positively related to MSF recorded in a sleep diary (r=.44).
- Females had an earlier mid sleep time than males by 23 minutes, despite no differences in CSM scores between sexes.
- The CSM indicated a trend toward eveningness in individuals aged 16-18 years, with a subsequent shift back toward morningness in older age.
- The Polish version of the CSM consists of two components of morningness, with cutoff scores identifying evening types as scoring 24 or less and morning types as scoring 43 or more.
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