The Stanford Sleepiness Scale (SSS) can be used to grade the degree of sleepiness that a person experiences.
Ability to Concentrate |
Sleepiness |
Scale |
maximum; fully alert; feel active and vital; |
absolutely none; wide awake |
1 |
high level but not at peak |
none |
2 |
moderate to high, relaxed but responsive |
minimal not fully alert |
3 |
moderate |
mild; a little foggy |
4 |
low |
moderate; foggy; loss of interest in staying awake; slowed down |
5 |
minimal |
high; sleepy, fighting sleep, prefer to lie down |
6 |
none |
maximum; almost in reverie, losing struggle to remain awake |
7 |
Specialty: Neurology