Insomnia Severity Index.
ISI
Perceived severity of insomnia (sleep-onset, maintenance, early-morning waking), satisfaction, daytime interference, noticeability and distress over the past 2 weeks
- Provisionally grouped under
- Length and format
- 7 items. 5-point Likert (0-4); summed 0-28; 0-7 none, 8-14 subthreshold, 15-21 moderate, 22-28 severe (self-report questionnaire)
- Language versions
- 30+ languages; very broadly validated and translated
- Licence
- copyrighted - author permission
The rights holder controls how this one may be used, so the route to it runs through the publisher or the author. We hold no direct link for it; the reference below is the citation to search from.
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- Reference
- Bastien, C. H., Vallieres, A., & Morin, C. M. (2001). Validation of the Insomnia Severity Index. Sleep Medicine, 2(4), 297-307.
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