The mean preferred time of going to sleep gets later and later until about age 20 and then starts a gradual reversal.

Question

Quizplus · Accepted Answer

According to research, the mean preferred time of going to sleep does get later until about age 20 and then starts to shift to earlier times as people age. This trend is due to changes in the circadian rhythm and an increase in responsibilities and social demands that require waking up earlier.

The Mean Preferred Time of Going to Sleep Gets Later