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Covariation of Intraindividual Variability in Cognitive Speed and Cognitive Performance across Young, Middle, and Older Adulthood
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Bielak, Allison A. M.; Anstey, Kaarin J. – Developmental Psychology, 2019
Intraindividual variability (IIV) in cognitive speed, or moment-to-moment changes in ability, is a developmental phenomenon indicative of neurological integrity that increases gradually across adulthood. Past research has shown that IIV negatively covaries with cognitive performance, in which higher IIV at one occasion is associated with poorer…
Descriptors: Cognitive Processes, Individual Differences, Cognitive Ability, Adult Development
Intraindividual Variability Is a Fundamental Phenomenon of Aging: Evidence from an 8-Year Longitudinal Study across Young, Middle, and Older Adulthood
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Bielak, Allison A. M.; Cherbuin, Nicolas; Bunce, David; Anstey, Kaarin J. – Developmental Psychology, 2014
Moment-to-moment intraindividual variability (IIV) in cognitive speed is a sensitive behavioral indicator of the integrity of the aging brain and brain damage, but little information is known about how IIV changes from being relatively low in young adulthood to substantially higher in older adulthood. We evaluated possible age group, sex, and task…
Descriptors: Foreign Countries, Aging (Individuals), Cognitive Processes, Reaction Time
Level of Cognitive Performance as a Correlate and Predictor of Health Behaviors that Protect against Cognitive Decline in Late Life: The Path through Life Study
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Anstey, Kaarin J.; Low, Lee-Fay; Christensen, Helen; Sachdev, Perminder – Intelligence, 2009
There is a lack of information on how cognitive ability relates to both health behaviors and change in health behaviors over time. This study examined verbal ability and processing speed as predictors of health behaviors in the PATH Through Life Study that includes cohorts aged in their 20s, 40s and 60s. Higher cognitive scores were associated…
Descriptors: Physical Activities, Health Behavior, Intelligence, Verbal Ability