Test-Re-Test Reliability and Internal Consistency of Rowland Universal Dementia Assessment Scale (RUDAS) among Palestinian Older Adults

Abstract

The Rowland Universal Dementia Assessment Scale (RUDAS) is a cognitive assessment suitable for diverse populations. However, the test-retest reliability and internal consistency of the Arabic version of RUDAS were not examined. This study aimed to examine these aspects. The Arabic RUDAS was administered twice to a sample of 37 older adults. The intraclass correlation coefficients and the Kappa coefficient examined the test-retest reliability. The internal consistency of the Arabic RUDAS was assessed using Cronbach’s alpha. The RUDAS showed high internal consistency (α = 0.866) and test-retest reliability (ICC = 0.971), with substantial agreement between tests (Kappa = 0.78). The Arabic RUDAS is highly reliable with Palestinian older adults.

Keywords:

• Arabic RUDAS
• test-retest reliability
• internal consistency

Author contributions

All authors demonstrated their collaborative accountability in this research project by contributing equally to the conception, design, data analysis, manuscript drafting, critical revisions, and final approval for publication.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The author(s) reported there is no funding associated with the work featured in this article.