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Stanford Sleepiness Scale (SSS)
Please visit this website for more information about the instrument: Stanford Sleepiness Scale
Supplemental: Myalgic encephalomyelitis/Chronic fatigue syndrome (ME/CFS), Parkinson's Disease
Short Description of Instrument
The Stanford Sleepiness Scale is used to quantify current sleepiness either during the day or night. The question measures where the participant rates their current level of sleepiness from 1=feeling active, wide awake to 7=no longer fighting sleep.
Population: Adults
Advantages: Instrument is freely available. Very brief and easy to administer throughout the day.
Hoddes E, Zarcone V, Smythe H, Phillips R, Dement WC. Quantification of sleepiness: a new approach. Psychophysiology 1973;10:431-436.


Document last updated July 2019
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