Cognitive Reserve Capacity: Exploring and Validating a Theoretical Model in Healthy Ageing

Area of Science:

• Neuroscience
• Psychology
• Gerontology

Background:

• Cognitive reserve (CR) is crucial for adaptive cognitive performance during aging.
• CR is indirectly measured using psychosocial/lifestyle proxies, but its organizational structure with cognitive functions is unclear.
• Existing measures of CR lack a validated theoretical model integrating proxy indicators and cognitive functions.

Purpose of the Study:

• To test a hypothetical, theoretical model of cognitive reserve (CR) capacity.
• To investigate the organizational structure of CR indicators, including traditional proxies and cognitive functions.
• To examine the construct validity of a dual-factor model of CR capacity.

Main Methods:

• Exploratory and confirmatory factor analysis (EFA and CFA) were used.
• Data from the Maastricht Ageing Study (MAAS) were analyzed.
• A secondary CFA validated the model using data from the Irish Longitudinal Study on Ageing (TILDA).

Main Results:

• A two-factor model comprising executive function/processing resources (EF/PR) and cumulative cognitive enrichment (CCE) was established.
• The model demonstrated strong convergent and discriminant validity in both MAAS and TILDA datasets.
• Factor correlations indicated significant relationships between EF/PR and CCE.

Conclusions:

• A dual model of CR capacity was elucidated, clarifying relationships between CR indicators.
• The findings reveal a two-factor structure for CR capacity, involving both control (EF/PR) and representational processes (CCE).
• This research provides a validated theoretical framework for understanding cognitive reserve in aging populations.