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The sleep of morning and evening types



The sleep of morning and evening types



Biological Psychology 7(1-2): 29-36



A questionnaire developed by Ostberg to differentiate morning types from evening types was administered to 100 college students. The actual sleep behavior of the 11 extreme morning types (larks) and the 10 extreme evening types (owls) was monitored for 2 wk with a sleep log and the Post-sleep Inventory. Data was collected from the owls for a further 2-wk period in which the owls were instructed to attempt to arise at the lark arousal time. In addition to going to bed earlier and getting up earlier than the owls, the larks had a less variable sleep length and awakening time and took shorter naps than the owls. Larks reported fewer physical problems and less mental activity across the night as well as more adequate sleep than owls, who differed little from the normal college population even after having their awakening time shifted.

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Accession: 006768349

Download citation: RISBibTeXText

PMID: 747718

DOI: 10.1016/0301-0511(78)90040-6



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