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The Gerontologist Advance Access originally published online on March 25, 2009
The Gerontologist 2009 49(2):236-247; doi:10.1093/geront/gnp023
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© The Author 2009. Published by Oxford University Press on Behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org.

The Alzheimer's Disease Knowledge Scale: Development and Psychometric Properties

Brian D. Carpenter, PhD1,2, Steve Balsis, MA2, Poorni G. Otilingam, MPH, MA3, Priya K. Hanson, MMFT4 and Margaret Gatz, PhD3

2 Department of Psychology, Washington University in St. Louis, Missouri
3 Department of Psychology, University of Southern California, Los Angeles
4 Department of Neurology, University of Southern California, Los Angeles

1 Address correspondence to Brian D. Carpenter, PhD, Department of Psychology, Washington University in St. Louis, Campus Box 1125, St. Louis, MO 63130. E-mail:bcarpenter{at}wustl.edu


  Abstract

Purpose: This study provides preliminary evidence for the acceptability, reliability, and validity of the new Alzheimer's Disease Knowledge Scale (ADKS), a content and psychometric update to the Alzheimer's Disease Knowledge Test. Design and Methods: Traditional scale development methods were used to generate items and evaluate their psychometric properties in a variety of subsamples. Results: The final 30-item, true/false scale takes approximately 5–10 min to complete and covers risk factors, assessment and diagnosis, symptoms, course, life impact, caregiving, and treatment and management. Preliminary results suggest that the ADKS has adequate reliability (test–retest and internal consistency) and validity (content, predictive, concurrent, and convergent). Implications: The ADKS is designed for use in both applied and research contexts, capable of assessing knowledge about Alzheimer's disease among laypeople, patients, caregivers, and professionals.

Keywords: Alzheimer's disease, Knowledge, Assessment, Psychometrics, Health education

Received January 6, 2008; Accepted April 11, 2008

Decision Editor: William J. McAuley, PhD


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