Dynamic neurocognitive adaptation in aging: Development and validation of a new scale

Area of Science:

• Neuroscience
• Gerontology
• Psychometrics

Background:

• Alzheimer's disease (AD) risk may be reduced by 45% through protective factors.
• Neurocognitive adaptive processes, including reserve, resilience, and resistance, share common protective mechanisms.
• A novel scale, Dynamic Neurocognitive Adaptation (DNA), was developed to assess these protective factors.

Purpose of the Study:

• To develop and validate the Dynamic Neurocognitive Adaptation (DNA) scale.
• To assess lifetime behaviors related to neurocognitive adaptation.
• To provide a tool for AD risk reduction research and clinical practice.

Main Methods:

• 815 participants (50% women, aged 65+) were included.
• Exploratory and confirmatory factor analysis were used on two subsamples.
• An initial 30-item scale investigating seven dimensions was refined to a 20-item, four-dimension scale.

Main Results:

• The final 20-item scale comprises physical, cognitive, creative, and social dimensions.
• Statistical analyses confirmed scale reliability and validity (Kaiser-Meyer-Olkin = 0.80, Cronbach's alpha = 0.83).
• No issues with multi-collinearity or non-collinearity were found.

Conclusions:

• The validated Dynamic Neurocognitive Adaptation scale is reliable, novel, and easy to complete.
• This scale can be used to assess lifetime protective factors for Alzheimer's disease risk reduction.
• The scale supports personalized health recommendations and identifies optimal life stages for risk-reduction interventions.