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ERIC Number: EJ942695
Record Type: Journal
Publication Date: 2011
Pages: 13
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0891-4222
Psychometric Properties of a Sleep Questionnaire for Use in Individuals with Intellectual Disabilities
Maas, Anneke P. H. M.; Didden, Robert; Korzilius, Hubert; Braam, Wiebe; Collin, Philippe; Smits, Marcel G.; Curfs, Leopold M. G.
Research in Developmental Disabilities: A Multidisciplinary Journal, v32 n6 p2467-2479 Nov-Dec 2011
We examined the psychometric properties of one part of the Sleep Questionnaire developed by Simonds and Parraga (SQ-SP; 1982), a questionnaire that is frequently used to explore sleep problems and behaviors related to sleep in individuals with intellectual disability (ID). The SQ-SP was completed for 345 individuals with ID (sleep clinic n = 146; control group n = 103; published studies n = 68; psychiatric clinic n = 28). Internal consistency was good (Cronbach's alpha = 0.80) and test-retest reliability for the total SQ-SP score was also good (Spearman's rank correlation = 0.83, p less than 0.01). Convergent validity was adequate (r = 0.79, p less than 0.001) and concurrent validity was satisfactory (r = 0.52, p less than 0.001). Exploratory factor analysis suggested a 5-factor structure (Snoring, Daytime sleepiness, Complaints related to sleep, Sleep apnea and Anxiety related to sleep). Internal consistency of the five factors ranged from modest (Cronbach's alpha = 0.57) to good (Cronbach's alpha = 0.82). Confirmatory factor analysis corroborated the 5-factor structure. The Composite Sleep Index, the total SQ-SP score and the factor scores on Daytime Sleepiness and Complaints related to sleep were able to differentiate the control group from the sleep clinic group. The SQ-SP appears to be a reliable and valid tool in assessing sleep and different types of sleep disturbance in individuals with ID. (Contains 1 figure and 5 tables.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A