Research
Mixed
Mood is the most sensitive measure of sleep deprivation, showing greater impairment than cognitive or motor performance, particularly under partial sleep deprivation conditions.
Monitor your mood closely when sleep-deprived. Mood deteriorates more severely than physical or cognitive output, serving as an early warning sign of sleep debt.
StrongSupportsHIGH confidence
we found that mood is more affected by sleep deprivation than either cognitive or motor performance
Why this rating
Meta-analysis provides robust quantitative evidence for the hierarchy of effects.
Source
Effects of Sleep Deprivation on Performance: A Meta-Analysis
June J. Pilcher et al. · SLEEP · 1996
DOI 10.1093/sleep/19.4.318
Meta-analysis · 19 studiesCited 1,545×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Sleep deprivation significantly impairs human functioning, with partial sleep deprivation having a more profound negative effect on mood and cognitive performance than short-term or long-term total sleep deprivation.Strong
- Partial sleep deprivation (sleeping <5 hours in 24 hours) has a greater negative impact on cognitive performance and mood than short-term or long-term total sleep deprivation.Good
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