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Daily, prospective associations between sleep architecture and affect: insights from Bayesian multilevel
Flora Le1, Yang Yap2, Dorothea Dumuid3
1School of Psychological Sciences, Monash University, Clayton, VIC 3800, Australia.
Summary
Shifting sleep stages impacts daily mood. Increasing slow wave sleep (SWS) may boost positive affect, while reducing REM sleep can increase negative affect. These findings offer insights into sleep and emotional well-being.
Area of Science:
- Sleep science
- Affective neuroscience
- Psychophysiology
Background:
- Emerging statistical methods enable analysis of sleep architecture's multilevel compositional nature.
- Understanding daily time reallocations between sleep stages (total wake time in bed [TWT], light sleep, slow wave sleep [SWS], and rapid eye movement [REM] sleep) is crucial for insights into post-sleep affect.
Purpose of the Study:
- To investigate the daily, prospective association between sleep architecture and affect.
- To examine how reallocating time between sleep stages influences mood and emotional states.
Main Methods:
- 96 healthy young adults participated over 15 consecutive days.
- Sleep architecture was measured nightly via electroencephalography (Z-Machine Insight+).
- Affect was assessed daily using the PANAS-X, and analyzed with Bayesian multilevel compositional data analysis.
Main Results:
- Sleep stage reallocations significantly predicted affect at both within- and between-person levels.
- Increasing SWS by 30 min/night (at the expense of light or REM sleep) was linked to higher positive affect.
- Shifting time from REM sleep or TWT to other stages was associated with changes in negative affect.
Conclusions:
- Distinct sleep architecture patterns are associated with affect in daily life.
- Extending SWS and REM sleep may improve affect, warranting further experimental research.
- Findings can inform diagnostic and intervention strategies for sleep and affective disorders.
Keywords:
Bayesian multilevel compositional data analysisREM sleepaffectsleepsleep architectureslow wave sleepMore Related Videos
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