Knowledge Tree
chronotype
Also known as: chronotype preference, chronotypes
Facts (16)
Sources
Sleep Across the Lifespan: A Neurobehavioral Perspective link.springer.com Feb 5, 2025 5 facts
claimSex differences in chronotype preference disappear after the age of 50, coinciding with menopause in women.
claimIndividuals with a later chronotype experience greater social jet lag (misalignment between internal circadian rhythm and external social schedule) and sleep loss.
claimThe transition to adulthood is often accompanied by a shift to an earlier chronotype profile, though this shift differs between biological sexes.
referenceRandler and Engelke (2019) conducted a meta-analysis showing that gender differences in chronotype diminish with age.
referenceResearch by Randler and Faßl (2017) indicates that morningness-eveningness (chronotype) undergoes developmental changes from newborns to early adulthood.
How sleep affects mental health (and vice versa) - Stanford Medicine med.stanford.edu Aug 11, 2025 3 facts
claimA study of nearly 75,000 people in the U.K. led by Jamie Zeitzer, a professor of psychiatry and behavioral sciences in sleep medicine at Stanford Medicine, found that going to bed early and waking up early is associated with better mental health outcomes, regardless of an individual's natural chronotype.
claimJamie Zeitzer and colleagues hypothesized that living in alignment with one's 'chronotype' (natural sleep patterns) would be healthier, but their study results contradicted this.
claimParticipants in a study of 75,000 people who went to bed late had higher risks of depression, anxiety, and other mental health disorders, regardless of whether their late bedtime aligned with their natural sleep preferences or chronotype.
Impact of sleep duration on executive function and brain structure nature.com Mar 3, 2022 3 facts
procedureThe researchers categorized chronotype by combining participants who chose 'more morning than evening' or 'more evening than morning' as a baseline group, compared to those who chose 'definitely morning' or 'definitely evening'.
claimThe multiple regression model examining the relationship between sleep duration and Executive Function controlled for age, sleep characteristics (chronotype, insomnia), obstructive sleep apnoea traits (daytime sleepiness, snoring), vascular co-morbidity, smoking, BMI, APOE ε4 genotype, and socioeconomic status.
claimA multiple regression model using Executive Function as the dependent variable confirmed a quadratic relationship between sleep duration and cognitive performance, controlling for age, chronotype, insomnia, obstructive sleep apnoea traits, vascular co-morbidity, smoking, BMI, APOE ε4 genotype, and socioeconomic status.
Sleep duration, chronotype, health and lifestyle factors ... bmjpublichealth.bmj.com 2 facts
claimChronotypes reflect an individual’s inclination to sleep at a particular time of the day as a manifestation of one’s circadian rhythm.
claimThe authors of the study 'Sleep duration, chronotype, health and lifestyle factors ...' analyze the influence of demographic, lifestyle, and comorbidity factors on the relationship between sleep patterns and cognitive function by treating these factors as potential covariates.
Investigating the impact of sleep quality on cognitive functions ... frontiersin.org 2 facts
referenceHicks, Meyer, and Watts (2023) examined the differential effects of chronotype on physical activity and cognitive performance in older adults, published in Frontiers in Epidemiology.
perspectiveEducational institutions could improve academic performance and promote healthier lifestyles by implementing scheduling flexibility that accounts for students' varying chronotypes, as some individuals perform better during later hours.
How Sleep Deprivation Impacts Mental Health columbiapsychiatry.org Mar 16, 2022 1 fact
claimChronotype is the natural inclination of a person's body to feel more alert at certain periods of the day and more tired at others.