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The Alzheimer's Disease Knowledge Scale: development and psychometric properties
Brian D Carpenter1, Steve Balsis, Poorni G Otilingam
1Department of Psychology, Washington University in St Louis, St Louis, MO 63130, USA. bcarpenter@wustl.edu
The Gerontologist
|April 14, 2009
Summary
The new Alzheimer's Disease Knowledge Scale (ADKS) shows promise as a reliable and valid tool for assessing knowledge about Alzheimer's disease in various populations. This updated scale is suitable for both research and practical applications.
Area of Science:
- Neuroscience
- Psychometrics
- Public Health
Background:
- Alzheimer's disease (AD) knowledge is crucial for effective care and management.
- Existing knowledge tests require updates to reflect current understanding.
- The Alzheimer's Disease Knowledge Test (ADKT) has been a foundational tool.
Purpose of the Study:
- To introduce and provide preliminary evidence for the Alzheimer's Disease Knowledge Scale (ADKS).
- To establish the acceptability, reliability, and validity of the ADKS.
- To present a content and psychometric update to the ADKT.
Main Methods:
- Utilized traditional scale development methodologies.
- Generated and refined scale items.
- Evaluated psychometric properties across diverse subsamples.
Main Results:
- The ADKS is a 30-item, true/false scale completed in 5-10 minutes.
- Covers key areas: risk factors, diagnosis, symptoms, impact, caregiving, and treatment.
- Demonstrated adequate reliability (test-retest, internal consistency) and validity (content, predictive, concurrent, convergent).
Conclusions:
- The ADKS is a psychometrically sound instrument for assessing Alzheimer's disease knowledge.
- The scale is suitable for application in research and clinical settings.
- It can be used with laypeople, patients, caregivers, and healthcare professionals.
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