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Construct validation of self-report with assistance to measure physical activity behavior in adults with intellectual disabilities

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dc.contributor.advisor McCubbin, Jeffrey A.
dc.creator Johnson, Marquell J
dc.date.accessioned 2008-09-15T21:34:19Z
dc.date.available 2008-09-15T21:34:19Z
dc.date.copyright 2008-08-08
dc.date.issued 2008-08-08
dc.identifier.uri http://hdl.handle.net/1957/9337
dc.description Graduation date: 2009 en_US
dc.description.abstract The purpose of this study was to examine the evidence of construct validity for self-report with assistance from a secondary source as a measure of physical activity (PA) in adults with intellectual disabilities (ID) in free-living environments. Thirty-seven participants (21 females, 16 males) with mild to moderate ID aged 19-74 years participated in the study. The Multitrait-Multimethod (MTMM) analysis was used to evaluate the evidence of construct validity for this procedure. Examination of the pattern of reliability and validity coefficients of the MTMM analysis revealed that the reliability coefficients for the self-report variables (PA and fat intake), activity counts, and step counts were higher than all convergent validity coefficients, except for the convergent validity between the two objective measures of PA, and discriminant validity coefficients. The convergent validity coefficients were greater than all of the discriminant validity coefficients except for the heterotrait-monomethod discriminant validity coefficient. The heterotrait-monomethod discriminant validity coefficient was higher than the heterotrait-heteromethod discriminant validity coefficients. The study demonstrated that self-report with assistance from a secondary source as a measure of PA in adults with ID has strong and generalized evidence of convergent validity and strong evidence of discriminant validity. en_US
dc.language.iso en_US en_US
dc.subject Intellectual Disabilities en_US
dc.subject Physical Activity en_US
dc.subject Measurement en_US
dc.subject.lcsh Exercise -- Evaluation en_US
dc.subject.lcsh People with mental disabilities -- Health and hygiene en_US
dc.title Construct validation of self-report with assistance to measure physical activity behavior in adults with intellectual disabilities en_US
dc.type Thesis en_US
dc.degree.name Doctor of Philosophy (Ph. D.) in Exercise and Sport Science en_US
dc.degree.level Doctoral en_US
dc.degree.discipline Health and Human Sciences en_US
dc.degree.grantor Oregon State University en_US
dc.contributor.committeemember Yun, Joonkoo
dc.contributor.committeemember Widrick, Jeffrey
dc.contributor.committeemember Hoffman, Mark
dc.contributor.committeemember Champeau, Donna


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