Stanford Sleepiness Scale (SSS)
The SSS is a subjective measure of sleepiness, frequently used for both research and clinical purposes. Whereas an instrument like the Epworth Sleepiness Scale (Chap. 29) examines general experiences of sleepiness over the course of an entire day, the SSS evaluates sleepiness at specific moments in time. Consisting of only one item, the scale requires respondents to select one of seven statements best representing their level of perceived sleepiness . As a single-item measure, the scale is best suited for repeated use over the course of a research study or treatment intervention.
- 1.Hoddes, E., Dement, W., & Zarcone, V. (1972). The development and use of the Stanford sleepiness scale (SSS). Psychophysiology, 9, 150.Google Scholar
Representative Studies Using Scale