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Daily Stress Processes as Contributors to and Targets for Promoting Cognitive Health in Later Life.
Psychosomatic Medicine 2018 October 7
OBJECTIVE: The aim of this study was to test the hypothesis that daily stress processes, including exposure and emotional reactivity to daily stressors, are associated with response time inconsistency (RTI), an indicator of processing efficiency and cognitive health. Furthermore, we considered daily stress-cognitive health associations at the level of individual differences and within-persons over time.
METHODS: Participants were 111 older adults (Mean=80 years, Range=66-95) enrolled in a measurement burst study where assessments of response-time based cognitive performance, stressful experiences, and affect were administered on each of 6 days over a two-week period. This protocol was repeated every six months for 2.5 years. Multilevel modeling was used to examine frequency of stressor exposure, non-stressor affect, and affect reactivity to daily stressors as individual difference and time-varying predictors of RTI.
RESULTS: Between-persons, higher levels of non-stressor negative affect (b=0.41, 95%CI: -0.01, 0.83, p=.055) and negative affect reactivity (b=0.80, 95%CI: 0.18, 1.42, p=.012) were associated with greater RTI. Within-persons over time, higher levels of negative affect (b=0.20, 95%CI: 0.06, 0.34, p=.006) and negative affect reactivity (b=0.13, 95%CI: 0.02, 0.24, p=.018) were associated with increased RTI among the oldest portion of the sample, while higher levels of positive affect (b=-0.11, 95% CI: -0.21, -0.02, p=.019) were associated with reduced RTI.
CONCLUSIONS: Negative affect reactions to daily stressors are associated with compromised RTI both between- and within-persons. Findings suggest that emotional reactions to daily stressors contribute to compromise older adults' cognitive health, while increased positive affect may be beneficial.
METHODS: Participants were 111 older adults (Mean=80 years, Range=66-95) enrolled in a measurement burst study where assessments of response-time based cognitive performance, stressful experiences, and affect were administered on each of 6 days over a two-week period. This protocol was repeated every six months for 2.5 years. Multilevel modeling was used to examine frequency of stressor exposure, non-stressor affect, and affect reactivity to daily stressors as individual difference and time-varying predictors of RTI.
RESULTS: Between-persons, higher levels of non-stressor negative affect (b=0.41, 95%CI: -0.01, 0.83, p=.055) and negative affect reactivity (b=0.80, 95%CI: 0.18, 1.42, p=.012) were associated with greater RTI. Within-persons over time, higher levels of negative affect (b=0.20, 95%CI: 0.06, 0.34, p=.006) and negative affect reactivity (b=0.13, 95%CI: 0.02, 0.24, p=.018) were associated with increased RTI among the oldest portion of the sample, while higher levels of positive affect (b=-0.11, 95% CI: -0.21, -0.02, p=.019) were associated with reduced RTI.
CONCLUSIONS: Negative affect reactions to daily stressors are associated with compromised RTI both between- and within-persons. Findings suggest that emotional reactions to daily stressors contribute to compromise older adults' cognitive health, while increased positive affect may be beneficial.
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