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Title

Amplitude of Fluctuations and Temporal Dependency in Intraindividual Variability: Prediction of Cognitive Performance Two Years Later
Authors
Ghisletta, Paolo
Fagot, Delphine
Lecerf, Thierry
De Ribaupierre, Anik
Published in GeroPsych. 2013, vol. 26, no. 3, p. 141-151
Abstract In a sample of 165 older individuals assessed twice at a 2-year interval on tasks of fluid and crystallized intelligence, and intensively (120 trials) on a simple reaction time task, we applied an autoregressive model to estimate both (1) amplitude and (2) time dependency in intraindividual variability (IIV). Results indicate that both IIV features are stronger predictors than the overall mean of intelligence scores 2 years later. Individuals that produced more (1) variable but also (2) erratic latencies of responses at baseline had lower intelligence scores 2 years later. We speculate that weaker time dependency in latency of response in simple reaction time tasks in older adults may be symptomatic of reduced brain integrity or more advanced degeneracy in functional brain circuitry.
Keywords Intraindividual variability, time-dependency, amplitude of fluctuations, autoregressive process, fluid and crystallized intelligence
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Structures
Faculté de psychologie et des sciences de l'éducation / Section de psychologie
Centres et instituts / Centre interfacultaire de gérontologie et d'études des vulnérabilités
Research groups Evaluation psychométrique et différences individuelles (EPEDI)
Méthodologie et analyse des données (MAD)
Citation
(ISO format) 		GHISLETTA, Paolo et al. Amplitude of Fluctuations and Temporal Dependency in Intraindividual Variability: Prediction of Cognitive Performance Two Years Later. In: GeroPsych, 2013, vol. 26, n° 3, p. 141-151. doi: 10.1024/1662-9647/a000091 https://archive-ouverte.unige.ch/unige:29601

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Deposited on : 2013-09-12

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