Journal
BEHAVIORAL SLEEP MEDICINE
Volume 9, Issue 4, Pages 216-223Publisher
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.1080/15402002.2011.606766
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Funding
- National Institutes of Health [R34 MH70805]
- NATIONAL INSTITUTE OF MENTAL HEALTH [R34MH070805] Funding Source: NIH RePORTER
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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, alpha = .61; Assessment 2, alpha >= .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.
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