Latitude affects Morningness-Eveningness: evidence for the environment hypothesis based on a systematic review

@article{Randler2017LatitudeAM,
  title={Latitude affects Morningness-Eveningness: evidence for the environment hypothesis based on a systematic review},
  author={Christoph Randler and Arash Rahafar},
  journal={Scientific Reports},
  year={2017},
  volume={7}
}
Morningness-eveningness (M/E) is an individual trait related to a person’s sleep-wake cycle and preference for morning or evening hours. The “environment hypothesis” suggests that M/E is dependent on environmental factors, such as latitude, mean average temperature and photoperiod. We here analyzed a large number of datasets to assess this effect based on a systematic review. Data were from a total of 87 datasets and 35,589 individuals based on 28 countries. Partial correlations correcting for… 

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References

SHOWING 1-10 OF 83 REFERENCES

Morningness–eveningness and the environment hypothesis – A cross-cultural comparison of Turkish and German adolescents

It is shown that the Morning Affect Factor and Morningness scores are equivalent in both countries and this fits into the environment hypothesis suggesting that populations near the equator should be more morning oriented.

Heritability of Morningness‐Eveningness and Self‐Report Sleep Measures in a Family‐Based Sample of 521 Hutterites

It is found that significant heritable influences on human circadian phase and subjective sleep indices can be detected through family‐based studies.

GENDER DIFFERENCES IN MORNINGNESS–EVENINGNESS PREFERENCE

The aim of this study was to analyze gender difference in morningness–eveningness preference using the Horne and Östberg questionnaire in the largest university student population selected so far.

Morningness‐Eveningness Comparison in Adolescents from Different Countries around the World

  • C. Randler
  • Psychology
    Chronobiology international
  • 2008
It was found that climate, longitude, and latitude contribute to chronotype, and adolescents were found to be more morning oriented both toward the East and North.

Differences in sun time within the same time zone affect sleep–wake and social rhythms, but not morningness preference: Findings from a Polish–German comparison study

Morningness–eveningness describes individual preferences for activity at specified times of the day. The present research aimed to test whether sun time entrains humans and whether this effect is

Composite scales of morningness and preferences: Preliminary validity data in Peruvian undergraduates

Preliminary results about the validity of the composite morningness scale (CS) and the early/late preferences scale (PS) in a Peruvian sample partially confirm Bohle et al.'s (2001) hypothesis about preferred rising and retiring times and their relationship with the PS, and actual rising time and its relationships with the CS and PS.
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