chronotype

[kroh-nuh-tahyp, kron-uh-, kroh-noh-]

noun

1. the tendency to be naturally more active or wakeful at a particular period of the day, varying in humans by individual and stage of life, and sometimes linked to other behaviors or to personality type.

   Typical office schedules cater to those with a morning chronotype, but some workers may be most productive in the late afternoon.

   Chronotype reflects a spectrum ranging from extreme preference for morning activity to extreme preference for evening activity.

Word History and Origins

Origin of chronotype¹

First recorded in 1970–75; chrono- ( def. ) + type ( def. )

Example Sentences

There is, however, a disclaimer: Before taking to the comments and writing “But I’m a hardcore night owl, and I see the dress as white and gold, checkmate!,” note that I said “everything else being equal,” as chronotype is just a crude approximation of lifetime exposure to a certain wavelength mix.

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Sleep duration was assessed from the Munich Chronotype questionnaire, and recreational social media use through the Youth Screen Time Survey.

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Participants themselves indicated their so called chronotype on a five-point scale: extreme morning type, moderate morning type, intermediate type, moderate evening type, or extreme evening type.

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"Our results indicate that extreme evening chronotype may be linked not only to poorer cardiovascular health in general, but also more specifically to calcification in the coronary arteries calcification and atherosclerosis," Mio Kobayashi Frisk says.

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Another weakness identified by the researchers is that participants themselves provided their chronotype.

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