2002, English, Article, Journal or magazine article edition: Mood and the circadian system : investigation of a circadian component in positive affect Allen, Nicholas B.; Murray, Greg; Trinder, John

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Physical Description
  • journal article
Published
  • Marcel Dekker, 2002
Language
  • English

Edition details

Title
  • Mood and the circadian system : investigation of a circadian component in positive affect
Author
  • Allen, Nicholas B.
  • Murray, Greg
  • Trinder, John
Other Contributors
  • Swinburne University of Technology. School of Social and Behavioural Sciences
Published
  • Marcel Dekker, 2002
Physical Description
  • journal article
Part Of
  • Chronobiology international, Vol. 19, no. 6 (2002), pp. 1151-1169
Subjects
Summary
  • The aim of this study was to test if the pattern of human mood variation across the day is consistent with the hypothesis that self-reports of positive affect (PA) have a circadian component, and self-reports of negative affect (NA) do not. Data were collected under two protocols: normal ambulatory conditions of activity and rest and during a 27h constant routine (CR) procedure. Mood data were collected every 3 h during the wake span of the ambulatory protocol and hourly during the 27h CR. In both protocols, rectal temperature data were continuously recorded. In the ambulatory protocol, activity data were also collected to enable estimation of the unmasked (purified) temperature rhythm. Participants were 14 healthy females aged 18 - 25 yr in the follicular phase of the menstrual cycle. Under both protocols, PA exhibited significant 24h temporal variation [CR: F(23,161) =​ 2.12; p 0.01; ambulatory: F(5, 55) =​ 2.44, p 0.05] with a significant sinusoidal component [CR: F(2, 21) 7.51, p 0.01; ambulatory: F(2,3) =​ 20.49, p .05] of the same form as the circadian temperature rhythm. In contrast, NA exhibited an increasing linear trend over time under the ambulatory protocol [F(1, 11) =​5.74, p 0.05] but nonsignificant temporal variation under the CR protocol. The findings support the hypothesis of a circadian component in PA variation.
Language
  • English
Related Resource
Identifier
  • oai:vtl.cc.swin.edu.au:swin:1910

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