# From Decades to Days: Long-Term Cognitive Functioning and Momentary Stress-Control Dynamics in Older Adults

## TL;DR

The study shows how long-term cognitive decline in older adults affects their daily stress and control beliefs over time.

## Contribution

It introduces a novel method combining long-term cognitive data with daily stress assessments to reveal dynamic control beliefs.

## Key findings

- Steeper cognitive decline correlates with lower perceived control and higher stress reactivity.
- Cognitive decline leads to greater fluctuations in perceived control, independent of stressor exposure.
- Long-term and short-term processes are closely linked in shaping daily functioning in older adults.

## Abstract

Multiple-time scale approaches offer new opportunities to examine how developmental processes unfolding over decades shape moment-to-moment experiences in daily life. Developmental theory suggests that long-term, age-related changes provide a foundation for short-term dynamics of stress and control. Supporting this view, prior work has shown that older adults whose disease burden had increased more across the past two decades experience more daily negative affect and heightened stress reactivity. Extending this line of inquiry, we combined data from 123 old adults (65–69 years, 47% women) and 32 very old adults (85–88 years, 59% women) who provided 24+ year within-person longitudinal data on cognitive (perceptual-motor) functioning and subsequently also completed repeated daily-life assessments of control beliefs and stress six times a day over 7 consecutive days as they were going about their daily-life routines. Using Dynamic Structural Equation Models that integrate long-term growth models with location-scale multilevel models revealed that older adults with steeper cognitive decline reported lower average base levels of perceived control, more reactivity to daily stressors, and more pronounced moment-to-moment fluctuations in perceived control that were independent of stressor exposure. We take our findings to showcase developmental processes evolving over vastly different timescales are closely intertwined and discuss how such new insights will inform developmental theories of control and daily-life functioning.

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Source: https://tomesphere.com/paper/PMC12763601