Tapping strength variability in sensorimotor experiments on rhythmic tapping

Nelias, C.; Schulz, Benjamin; Datseris, G.; Geisel, T.

doi:10.1063/5.0211078

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Tapping strength variability in sensorimotor experiments on rhythmic tapping

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Nelias, C.
Department of Nonlinear Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Schulz, Benjamin
Group Structure formation in soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Datseris, G.
Department of Nonlinear Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Geisel, T.
Department of Nonlinear Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Nelias, C., Schulz, B., Datseris, G., & Geisel, T. (2024). Tapping strength variability in sensorimotor experiments on rhythmic tapping. Chaos: an interdisciplinary journal of nonlinear science, 34(10): 103112. doi:10.1063/5.0211078.

Cite as: https://hdl.handle.net/21.11116/0000-000F-F8E7-5

Abstract

We report psychophysical experiments and time series analyses to investigate sensorimotor tapping strength fluctuations in human periodic
tapping with and without a metronome. The power spectral density of tapping strength fluctuations typically decays in an inverse power
law (1/fβ -noise) associated with long-range correlations, i.e., with a slow power-law decay of tapping strength autocorrelations and scale-free
behavior. The power-law exponents β are scattered around β = 1 ranging from 0.67 to 1.8. A log-linear representation of the power spectral
densities reveals rhythmic peaks at frequencies f = 0.25 (and f = 0.5) and a tendency to slightly accentuate every fourth (and second) stroke
when subjects try to synchronize their tapping with a metronome.