1469-8986/asset/cover.gif?v=1&s=6ca09d4f0d41a8f12ce466421b706c5d79192e87 "Psychophysiology")
Supported by National Institute of Mental Health Grant MH19071.
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Quantification of Sleepiness: A New Approach
Article first published online: 30 JAN 2007
DOI: 10.1111/j.1469-8986.1973.tb00801.x
Additional Information
How to Cite
Hoddes, E., Zarcone, V., Smythe, H., Phillips, R. and Dement, W. C. (1973), Quantification of Sleepiness: A New Approach. Psychophysiology, 10: 431–436. doi: 10.1111/j.1469-8986.1973.tb00801.x
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Supported by National Institute of Mental Health Grant MH19071.
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Supported by National Institute of Mental Health Grant MH19071 and by funds from the Veterans Administration Hospital, Palo Alto, Calif.
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Supported by research funds from the Veterans Administration.
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Supported by National Institute of Mental Health Grant MH13860, Research Career Development Award 3 K3-MH 5804 from U.S. Public Health Service, Grant NGR 05-020-168 from the National Aeronautics and Space Administration.
Publication History
- Issue published online: 30 JAN 2007
- Article first published online: 30 JAN 2007
- Abstract
- References
- Cited By
Keywords:
- Sleepiness;
- Sleep;
- Rating scale;
- Performance testing
ABSTRACT
The Stanford Sleepiness Scale (SSS) is a self-rating scale which is used to quantify progressive steps in sleepiness. The present study investigated whether the SSS cross-validates with performance on mental tasks and whether the SSS demonstrates changes in sleepiness with sleep loss. Five college student Ss were given a brief test of memory and the Wilkinson Addition Test in 2 test sessions and The Wilkinson Vigilance Test in 2 other sessions spaced throughout a 16-hr day for 6 days. Ss made SSS ratings every 15 min during their waking activities. On night 4, Ss underwent all night sleep deprivation. On all other nights, Ss were allowed only 8 hrs in bed. Mean SSS ratings correlated r= .68 with performance on the Wilkinson Tests. Discrete SSS ratings correlated r= .47 with performance on the memory test. Moreover, mean baseline SSS ratings were found to be significantly lower than corresponding ratings of the deprivation period.