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Behav Sleep Med. 2011;9(4):216-23. doi: 10.1080/15402002.2011.606766.

Validation of the insomnia severity index as a web-based measure.

Author information

1
Department of Psychiatry and Neurobehavioral Sciences Behavioral Health and Technology, University of Virginia Health System, Charlottesville, USA. fthorndike@virginia.edu

Abstract

Although the Insomnia Severity Index (ISI) is already administered online, this frequently used instrument has not been validated for Web delivery. This study compares online and paper-and-pencil ISI versions completed by participants in a randomized controlled trial testing an Internet-delivered intervention for insomnia. Forty-three adults with insomnia completed both ISI versions during pre- (Assessment 1) and post-intervention (Assessment 2). Correlations between total scores of both versions were significant (rs ≥ .98, ps < .001). For both ISI versions, internal consistency was acceptable (Assessment 1, α = .61; Assessment 2, α ≥ .88). Among participants not receiving the parent study intervention, correlations between 1 format at Assessment 1 and the alternative format at Assessment 2 were generally significant (rs = .26-.82). Together, findings suggest the ISI can be delivered online.

PMID:
22003975
DOI:
10.1080/15402002.2011.606766
[Indexed for MEDLINE]

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