OBJECTIVE: Standardized cross-national assessments of cognitive functioning remain scarce despite dementia being a major global health concern. This study examined the psychometric properties of the Survey of Health, Aging, and Retirement in Europe Harmonized Cognitive Assessment Protocol, a newly developed cognitive assessment instrument for Europe. Sample included 2,685 adults aged 65+ from the Czech Republic, Denmark, France, Germany, and Italy. METHOD: Confirmatory factor analyses tested unidimensional models for five cognitive domains-memory, executive functioning, visuospatial skills, language/fluency, and orientation-alongside correlated and second-order factor models. A second-order structure showed adequate fit, supporting five domain factors and one general cognitive performance factor. RESULTS: Factor scores were positively associated with education and negatively with age, and approximate measurement invariance of the five cognitive domain scores was supported across countries. CONCLUSIONS: These findings establish the Survey of Health, Aging, and Retirement in Europe Harmonized Cognitive Assessment Protocol as a psychometrically sound tool for cross-national comparisons of cognitive health. (PsycInfo Database Record (c) 2026 APA, all rights reserved).
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