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Morningness and Conscientiousness: A Meta-analysis, Online Survey and Resting fMRI Study
Debore Buzoku1, Sahar Esmat1, Ray Norbury1
1Department of Life Sciences, Division of Psychology, Centre for Cognitive and Clinical Neuroscience, College of Health, Medicine and Life Sciences, Brunel University London, United Kingdom.
Journal of Circadian Rhythms
|April 14, 2025
Summary
Morningness, or being an early bird, is linked to conscientiousness. This association is strengthened by functional connectivity within the brain's Default Mode Network (DMN).
Area of Science:
- Psychology
- Neuroscience
- Chronobiology
Background:
- Morningness is linked to positive health and personality traits, including conscientiousness.
- Previous research supports an association between morningness and conscientiousness.
Purpose of the Study:
- To meta-analyze the relationship between morningness and conscientiousness.
- To investigate the moderating role of Default Mode Network (DMN) functional connectivity in this relationship.
Main Methods:
- Meta-analysis of existing studies on morningness and conscientiousness.
- Survey data collection.
- Resting-state functional Magnetic Resonance Imaging (rs-fMRI) with N=43 participants.
Main Results:
- Meta-analysis confirmed a significant association between morningness and conscientiousness.
- rs-fMRI data revealed that DMN functional connectivity moderates the morningness-conscientiousness link.
- Higher DMN connectivity correlates with higher conscientiousness.
Conclusions:
- The relationship between morningness and conscientiousness is influenced by DMN functional connectivity.
- DMN connectivity plays a role in cognitive functions associated with conscientiousness.
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