Walking Changes the Dynamics of Cognitive Estimates of Time Intervals

Cognitive performance exhibits patterns of trial-to-trial variation that can be described as 1/f or pink noise, as do repeated measures of locomotor performance. Although cognitive and locomotor performances are known to interact when performed concurrently, it is not known whether concurrent perfor...

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Veröffentlicht in:Journal of experimental psychology. Human perception and performance 2009-10, Vol.35 (5), p.1532-1541
Hauptverfasser: Kiefer, Adam W, Riley, Michael A, Shockley, Kevin, Villard, Sebastien, Van Orden, Guy C
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Sprache:eng
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Zusammenfassung:Cognitive performance exhibits patterns of trial-to-trial variation that can be described as 1/f or pink noise, as do repeated measures of locomotor performance. Although cognitive and locomotor performances are known to interact when performed concurrently, it is not known whether concurrent performance affects the tasks' pink noise dynamical structure. In this study, participants performed a cognitive task (repeatedly producing a temporal interval) and a motor task (walking on a treadmill) in single- and dual-task conditions. In single-task conditions both tasks exhibited pink noise structure. For concurrent performance the dynamical structure of the cognitive task changed reliably in the direction of white (random) noise. The dynamical structure of locomotion remained pink noise. The change in cognitive dynamics occurred despite no reliable changes in mean or standard deviation measures for either task. The results suggest a functional reorganization of cognitive dynamics supporting successful task performance in dual-task conditions.
ISSN:0096-1523
1939-1277
DOI:10.1037/a0013546