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[Sleepiness scale and an experimental approach (author's transl)]
Shinrigaku Kenkyu : the Japanese Journal of Psychology
|February 1, 1982
Summary
The Kwansei Gakuin Sleepiness Scale (KSS) effectively measures sleepiness, correlating with performance and fatigue. It also reveals circadian rhythms in sleepiness during sleep deprivation.
Area of Science:
- Psychology
- Sleep Science
- Psychometrics
Context:
- Assessing subjective sleepiness is crucial for understanding cognitive function and fatigue.
- The Stanford Sleepiness Scale (SSS) is a precursor, but newer scales offer potential improvements.
- Understanding circadian variations in sleepiness is vital for shift work and sleep disorder research.
Purpose:
- To validate the Kwansei Gakuin Sleepiness Scale (KSS) against objective measures.
- To investigate the correlation between KSS ratings and vigilance task performance, fatigue levels, and oral temperature.
- To examine the circadian variation of KSS ratings during prolonged sleep deprivation.
Summary:
- The KSS demonstrated significant correlations with vigilance task performance, fatigue test results, and oral temperature.
- Sleep deprivation significantly impacted KSS ratings, confirming its sensitivity to reduced sleep.
- Circadian rhythms in sleepiness were evident in the KSS ratings over a 40-hour period.
Impact:
- The KSS is a reliable tool for assessing subjective sleepiness and its relationship with physiological and performance metrics.
- Findings contribute to the understanding of sleepiness dynamics, including circadian influences.
- This research supports the use of KSS in studies involving sleep deprivation and circadian rhythm research.