Beyond Cronbach's Alpha: Analysis of Instrument Reliability Issues in an Older Adult Sample

2.50
Hdl Handle:
http://hdl.handle.net/10755/159070
Type:
Presentation
Title:
Beyond Cronbach's Alpha: Analysis of Instrument Reliability Issues in an Older Adult Sample
Abstract:
Beyond Cronbach's Alpha: Analysis of Instrument Reliability Issues in an Older Adult Sample
Conference Sponsor:Midwest Nursing Research Society
Conference Year:2006
Author:Sorensen, Elizabeth, PhD, RN, CNOR
P.I. Institution Name:Wright State University
Title:Assistant Professor
Contact Address:CON - 114 University Hall, 3640 Col. Glenn Hwy., Dayton, OH, 45435, USA
Contact Telephone:937.775.2597
Co-Authors:Nancy A. Ryan-Wenger, PhD, RN, PNP, Professor and Bonnie J. Garvin, PhD, RN, Professor
Problem: Despite selection of instruments based on adequate reliability and validity from prior research studies and appropriate readability, five instruments and their subscales demonstrated surprisingly low Cronbach's alpha coefficients in a study of older adult coronary artery bypass surgery (CABS) patients. Purposes: The purposes of this secondary analysis were to: 1) examine older adult characteristics which may affect instrument reliability, 2) apply classical measurement theory and the Domain Sampling Model to evaluate the internal consistency, items, subscales, and total scores against established criteria, and 3) make recommendations for future use of these instruments in older adult samples. Sample: Seventy adults having first time CABS; mean 72 years of age, mostly white (94%) males (66%). Instruments The 9-item Krantz Health Opinion Survey-Information Subscale, 4-item Control Attitudes Scale, 66-item Ways of Coping Questionnaire, 15-item Geriatric Depression Scale and Medical Outcomes Study Short Form-12 were evaluated. Methods: SPSS 11.0 Scale Reliability Analysis and analysis of anecdotal notes. Results and Conclusions: Cronbach's alpha coefficients were surprisingly low, i.e. 3 subscales from .55 to .58, 9 subscales and 2 total scales from .61 to .69, and 2 subscales from .71 to .74. Other reliability measures were satisfactory for the Control Attitudes Scale, Ways of Coping Questionnaire, Geriatric Depression Scale, and Medical Outcomes Study Short Form-12. These instruments are recommended for use in older adult samples. The Krantz Health Opinion Survey is not recommended for use in older adult samples.
Repository Posting Date:
26-Oct-2011
Date of Publication:
17-Oct-2011
Sponsors:
Midwest Nursing Research Society

Full metadata record

DC FieldValue Language
dc.typePresentationen_GB
dc.titleBeyond Cronbach's Alpha: Analysis of Instrument Reliability Issues in an Older Adult Sampleen_GB
dc.identifier.urihttp://hdl.handle.net/10755/159070-
dc.description.abstract<table><tr><td colspan="2" class="item-title">Beyond Cronbach's Alpha: Analysis of Instrument Reliability Issues in an Older Adult Sample</td></tr><tr class="item-sponsor"><td class="label">Conference Sponsor:</td><td class="value">Midwest Nursing Research Society</td></tr><tr class="item-year"><td class="label">Conference Year:</td><td class="value">2006</td></tr><tr class="item-author"><td class="label">Author:</td><td class="value">Sorensen, Elizabeth, PhD, RN, CNOR</td></tr><tr class="item-institute"><td class="label">P.I. Institution Name:</td><td class="value">Wright State University</td></tr><tr class="item-author-title"><td class="label">Title:</td><td class="value">Assistant Professor</td></tr><tr class="item-address"><td class="label">Contact Address:</td><td class="value">CON - 114 University Hall, 3640 Col. Glenn Hwy., Dayton, OH, 45435, USA</td></tr><tr class="item-phone"><td class="label">Contact Telephone:</td><td class="value">937.775.2597</td></tr><tr class="item-email"><td class="label">Email:</td><td class="value">elizabeth.sorensen@wright.edu</td></tr><tr class="item-co-authors"><td class="label">Co-Authors:</td><td class="value">Nancy A. Ryan-Wenger, PhD, RN, PNP, Professor and Bonnie J. Garvin, PhD, RN, Professor</td></tr><tr><td colspan="2" class="item-abstract">Problem: Despite selection of instruments based on adequate reliability and validity from prior research studies and appropriate readability, five instruments and their subscales demonstrated surprisingly low Cronbach's alpha coefficients in a study of older adult coronary artery bypass surgery (CABS) patients. Purposes: The purposes of this secondary analysis were to: 1) examine older adult characteristics which may affect instrument reliability, 2) apply classical measurement theory and the Domain Sampling Model to evaluate the internal consistency, items, subscales, and total scores against established criteria, and 3) make recommendations for future use of these instruments in older adult samples. Sample: Seventy adults having first time CABS; mean 72 years of age, mostly white (94%) males (66%). Instruments The 9-item Krantz Health Opinion Survey-Information Subscale, 4-item Control Attitudes Scale, 66-item Ways of Coping Questionnaire, 15-item Geriatric Depression Scale and Medical Outcomes Study Short Form-12 were evaluated. Methods: SPSS 11.0 Scale Reliability Analysis and analysis of anecdotal notes. Results and Conclusions: Cronbach's alpha coefficients were surprisingly low, i.e. 3 subscales from .55 to .58, 9 subscales and 2 total scales from .61 to .69, and 2 subscales from .71 to .74. Other reliability measures were satisfactory for the Control Attitudes Scale, Ways of Coping Questionnaire, Geriatric Depression Scale, and Medical Outcomes Study Short Form-12. These instruments are recommended for use in older adult samples. The Krantz Health Opinion Survey is not recommended for use in older adult samples.</td></tr></table>en_GB
dc.date.available2011-10-26T21:40:27Z-
dc.date.issued2011-10-17en_GB
dc.date.accessioned2011-10-26T21:40:27Z-
dc.description.sponsorshipMidwest Nursing Research Societyen_GB
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