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More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration

Lee Di Milia, Simon Folkard

Frontiers in Psychology, Volume: 12

Swansea University Author: Simon Folkard

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DOI (Published version): 10.3389/fpsyg.2021.782349

Abstract

Self-report tools that measure circadian rhythms have focused primarily on phase. We add to the sparse literature on assessing amplitude and stability. We randomly recruited 1,163 participants who completed several measures. The correlation between the LV scale (amplitude) and FR scale (stability) w...

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Published in: Frontiers in Psychology
ISSN: 1664-1078
Published: Frontiers Media SA 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa58897
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first_indexed 2021-12-06T11:03:40Z
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spelling 2021-12-31T12:36:31.8825484 v2 58897 2021-12-06 More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration 6c54366648a979dfec8d338d85c1d100 Simon Folkard Simon Folkard true false 2021-12-06 FGMHL Self-report tools that measure circadian rhythms have focused primarily on phase. We add to the sparse literature on assessing amplitude and stability. We randomly recruited 1,163 participants who completed several measures. The correlation between the LV scale (amplitude) and FR scale (stability) was −0.12 (p < 0.01). As expected, amplitude was negatively associated with phase (r = −0.64, p < 0.01) while stability showed a weak link with phase (r = 0.07, p < 0.05). Structural equation modeling suggested a close model-fit of the factor structure in the sample (RMSEA = 0.033). The LV scale explained 22% of the variance, while the FR scale explained 23%. Scale reliability was satisfactory for the LV scale (0.68) and good for the FR scale (0.73). Participants with low amplitude or flexible rhythms reported significantly better resilience, coping, and required less daily sleep. We constructed a composite circadian categorical variable to combine the best attributes from the LV and FR scales; participants with both low amplitude and flexible rhythms, reported significantly better resilience, coping, and less sleep need. We found rhythm amplitude decreased with age, while stability remained constant. Journal Article Frontiers in Psychology 12 Frontiers Media SA 1664-1078 amplitude, flexibility, languid, circadian, phase, resilience 16 11 2021 2021-11-16 10.3389/fpsyg.2021.782349 COLLEGE NANME Medicine, Health and Life Science - Faculty COLLEGE CODE FGMHL Swansea University Data collection was funded by a grant from the Institute for Health and Social Science Research at Central Queensland University, Australia. 2021-12-31T12:36:31.8825484 2021-12-06T11:01:45.3146765 Faculty of Medicine, Health and Life Sciences School of Psychology Lee Di Milia 1 Simon Folkard 2 58897__21798__2eb71c752d3b4ca4b97c95ac499f112a.pdf fpsyg-12-782349.pdf 2021-12-06T11:01:45.3146350 Output 417477 application/pdf Version of Record true This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). true eng http://creativecommons.org/licenses/by/4.0/
title More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration
spellingShingle More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration
Simon Folkard
title_short More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration
title_full More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration
title_fullStr More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration
title_full_unstemmed More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration
title_sort More Than Morningness: The Effect of Circadian Rhythm Amplitude and Stability on Resilience, Coping, and Sleep Duration
author_id_str_mv 6c54366648a979dfec8d338d85c1d100
author_id_fullname_str_mv 6c54366648a979dfec8d338d85c1d100_***_Simon Folkard
author Simon Folkard
author2 Lee Di Milia
Simon Folkard
format Journal article
container_title Frontiers in Psychology
container_volume 12
publishDate 2021
institution Swansea University
issn 1664-1078
doi_str_mv 10.3389/fpsyg.2021.782349
publisher Frontiers Media SA
college_str Faculty of Medicine, Health and Life Sciences
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hierarchy_top_id facultyofmedicinehealthandlifesciences
hierarchy_top_title Faculty of Medicine, Health and Life Sciences
hierarchy_parent_id facultyofmedicinehealthandlifesciences
hierarchy_parent_title Faculty of Medicine, Health and Life Sciences
department_str School of Psychology{{{_:::_}}}Faculty of Medicine, Health and Life Sciences{{{_:::_}}}School of Psychology
document_store_str 1
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description Self-report tools that measure circadian rhythms have focused primarily on phase. We add to the sparse literature on assessing amplitude and stability. We randomly recruited 1,163 participants who completed several measures. The correlation between the LV scale (amplitude) and FR scale (stability) was −0.12 (p < 0.01). As expected, amplitude was negatively associated with phase (r = −0.64, p < 0.01) while stability showed a weak link with phase (r = 0.07, p < 0.05). Structural equation modeling suggested a close model-fit of the factor structure in the sample (RMSEA = 0.033). The LV scale explained 22% of the variance, while the FR scale explained 23%. Scale reliability was satisfactory for the LV scale (0.68) and good for the FR scale (0.73). Participants with low amplitude or flexible rhythms reported significantly better resilience, coping, and required less daily sleep. We constructed a composite circadian categorical variable to combine the best attributes from the LV and FR scales; participants with both low amplitude and flexible rhythms, reported significantly better resilience, coping, and less sleep need. We found rhythm amplitude decreased with age, while stability remained constant.
published_date 2021-11-16T04:15:47Z
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score 11.013371

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