For some people, 9 or 10 p.m. is not “too early” for bed, it is simply when the day feels finished. While friends may still be scrolling, watching television or chatting late into the night, early sleepers may already be switching off the lights. Psychology suggests that this habit can reflect more than just tiredness. Chronotype, circadian rhythms, conscientiousness, habit formation and the desire for routine can all influence when someone naturally wants to sleep.
That does not mean everyone who sleeps early has the same personality. Sleep timing is influenced by biology, age, work schedules, light exposure and social demands. But researchers have found some intriguing associations between morningness, personality and regular sleep patterns.
