PSYCHOMETRIC AND NORMATIVE INDICATORS OF THE PORTUGUESE VERSION OF THE ADDENBROOKE’S COGNITIVE EXAMINATION- III. PRELIMINARY STUDY ON A SAMPLE OF HEALTHY SUBJECTS
Journal Title: Acta Neuropsychologica - Year 2015, Vol 13, Issue 2
Abstract
Background: Recently a third version of the Addenbrooke‘s Cognitive Examination (ACE-III) was developed in order to improve previous versions. The present work aims to determine some psychometric properties ofACE-III, such as: internal reliability of ACE-III validity evidence pertaining to the instrument’s internal structure, convergent and divergent validity evidence. Additionally, the influence of sociode mo graphic variables on the test’s performance was studied and normative tables for the Portuguese version of ACE-III were produced.Material/Methods: The study enrolled a convenience sample made up of healthy volunteers (n=100) without any subjective complain of memory loss and completely independent in daily life activities. Internal reliability of ACE-III was determined trough Cronbach’s alpha, validity evidence pertaining to the instrument’s internal structure was established by using inter domain correlations, convergent and divergent validity were determined by correlations between. Multiple linear regressions were performed to determine the predictive variables and to generate normative equations.Results: Results point to a good construct validity, with acceptable reliability (α=.732) and significant inter-domains correlations. The Portuguese version of ACE-III also revealed convergent and divergent validity. Multiple linear regression determined age and education as the sole predictors of the ACE-III results. Normative tables were created based on those variables.Conclusions: The availability of ACE-III normative equations based on a healthy sample according to age and education enables the use of a brief screening tool for cognitive functioning.
Authors and Affiliations
António Machado, Élia Baeta, Paulo Pimentel, Bruno Peixoto
Keywords
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