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the claim

Being a morning person or a night person is a biologically driven trait rather than just a preference

the verdict
SUPPORTED
the evidence backs this
Recorded sources
4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that being a morning person or a night person is a biologically driven trait rather than just a preference?

Yes. Scientific literature strongly supports the view that chronotype is a biologically driven trait influenced by genetics and circadian rhythms rather than merely a matter of personal choice.

Verdict: SUPPORTED · 4 sources for, 0 against · Last checked

The analysis

The provided papers consistently demonstrate that chronotype is rooted in genetics, endocrine profiles (like cortisol and melatonin), circadian regulation, and physiological markers. None of the papers refute this biological basis; therefore, the claim is supported.

Evidence for · 4
Beyond Sleep: A Multidimensional Model of Chronotype.
2023
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Chauhan, S., Norbury, R., Fassbender, K., Ettinger, U., & Kumari, V. (2023). Beyond Sleep: A Multidimensional Model of Chronotype.. doi.org. https://doi.org/10.1016/j.neubiorev.2023.105114

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More for · 3
Meal timing and its role in obesity and associated diseases.
2024
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B, P., J, V., & O, P. (2024). Meal timing and its role in obesity and associated diseases.. doi.org. https://doi.org/10.3389/fendo.2024.1359772

The prevalence of morningness–eveningness in university-level students of North-East India: Impact on their sleep physiology and metabolic processes
2025
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Bhattacharjee, A. & Chakraborty, A. (2025). The prevalence of morningness–eveningness in university-level students of North-East India: Impact on their sleep physiology and metabolic processes. doi.org. https://doi.org/10.1080/07420528.2025.2511259

Exploring the Causal Association between Morning Diurnal Preference and Psychiatric Disorders: A Bidirectional Two-Sample Mendelian Randomization Analysis.
2024
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M, C., DS, T., X, W., Z, Y., Z, X., D, Z., D, W., Y, Z., Y, Q., & Y, J. (2024). Exploring the Causal Association between Morning Diurnal Preference and Psychiatric Disorders: A Bidirectional Two-Sample Mendelian Randomization Analysis.. doi.org. https://doi.org/10.3390/life14101225

What does the evidence say?

The provided papers consistently demonstrate that chronotype is rooted in genetics, endocrine profiles (like cortisol and melatonin), circadian regulation, and physiological markers. None of the papers refute this biological basis; therefore, the claim is supported.

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8704 Aug 2026
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