Chronotype
A chronotype is the behavioral manifestation of an underlying circadian rhythm's myriad physical processes. A person's chronotype is the propensity for the individual to sleep at a particular time during a 24-hour period. Eveningness (delayed sleep period; most active and alert in the evening) and morningness (advanced sleep period; most active and alert in the morning) are the two extremes with most individuals having some flexibility in the timing of their sleep period. However, across development there are changes in the propensity of the sleep period with pre-pubescent children preferring an advanced sleep period, adolescents preferring a delayed sleep period and many elderly preferring an advanced sleep period.
"Diurnal variation" redirects here. For the temperature range between daily highs and lows, see Diurnal temperature variation. This article needs to be updated. Please help update this article to reflect recent events or newly available information. (May 2026) A chronotype is the behavioral manifestation of an underlying circadian rhythm's myriad physical processes. A person's chronotype is the propensity for the individual to sleep at a particular time during a 24-hour period. Eveningness (delayed sleep period; most active and alert in the evening) and morningness (advanced sleep period;…
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