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TitleLongitudinal measurement invariance of memory performance and executive functioning in healthy aging
Author(s)Moreira, Pedro Miguel Silva
Santos, Nadine Correia
Castanho, Teresa Jesus Costa
Amorim, Liliana Patrícia Carvalho
Nunes, José Carlos Leitão Portugal
Sousa, Nuno
Costa, Patrício Soares
Issue date2018
PublisherPublic Library of Science (PLOS)
JournalPLoS ONE
CitationMoreira, P. S., Santos, N., Castanho, T., Amorim, L., Portugal-Nunes, C., Sousa, N., & Costa, P. (2018). Longitudinal measurement invariance of memory performance and executive functioning in healthy aging. PloS one, 13(9), e0204012
Abstract(s)In this work, we examined the longitudinal measurement invariance of a battery composed of distinct cognitive parameters. A sample of 86 individuals (53.5% females; mean age = 65.73), representative of the Portuguese older population, with respect to sex, age and level of education was assessed twice over an average of two years. By means of a confirmatory factor analysis approach, we tested whether a two-factor solution [corresponding to measures of memory performance (MEM) and executive functioning (EXEC)] was reliable over time. Nested models of longitudinal invariance demonstrated the existence of partial strong invariance over time. In other words, this indicates that there is an equivalence of the factorial structure and factor loadings for all items; this was also observed for the item intercepts for all the items, except for one of the items from the EXEC dimension. Stability coefficients revealed high associations between the dimensions over time and that, whereas there was a significant decline of the MEM across time, this was not observed for the EXEC dimension. These findings reveal that changes in MEM and EXEC scores can be attributed to true changes on these constructs, enabling the use of this battery as a reliable method to study cognitive aging.
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AccessOpen access
Appears in Collections:ICVS - Artigos em Revistas Internacionais com Referee

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