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Psychosocial stress has been identified as an important modifiable risk factor for normal and pathological cognitive aging. Evidence exists showing psychosocial stress predicting poorer performance across multiple cognitive domains (e.g., working memory), with limited research considering stress effects on response time inconsistency (RTI). Using data from a measurement burst design, 111 older adults (Mage=80, Range=66–95) completed a processing speed task on 6 occasions over a 14-day period, repeating this protocol every 6 months for 2.5 years. Participants also completed measures of daily and perceived stress. Results from multilevel models revealed that individual differences in emotional (affect) and psychosomatic (pain) reactions to daily stressors and global perceptions of stress were associated with greater RTI (ps<.001). Additionally, these associations increased with age (p<.01). Discussion will focus on the importance of different dimensions of psychosocial stress for understanding cognitive aging, and the utility of measurement burst designs for examining stress-RTI links.
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