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  Accumulation of Inertial Sensory Information in the Perception of Whole Body Yaw Rotation

Nesti, A., de Winkel, K., & Bülthoff, H. (2017). Accumulation of Inertial Sensory Information in the Perception of Whole Body Yaw Rotation. PLoS ONE, 12(1), 1-14. doi:10.1371/journal.pone.0170497.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-C34B-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-8781-4
Genre: Journal Article

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Nesti, A1, Author              
de Winkel, KN1, 2, 3, Author              
Bülthoff, HH1, 3, 4, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Project group: Motion Perception & Simulation, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528705              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
4Project group: Cybernetics Approach to Perception & Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528701              

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 Abstract: While moving through the environment, our central nervous system accumulates sensory information over time to provide an estimate of our self-motion, allowing for completing crucial tasks such as maintaining balance. However, little is known on how the duration of the motion stimuli influences our performances in a self-motion discrimination task. Here we study the human ability to discriminate intensities of sinusoidal (0.5 Hz) self-rotations around the vertical axis (yaw) for four different stimulus durations (1, 2, 3 and 5 s) in darkness. In a typical trial, participants experienced two consecutive rotations of equal duration and different peak amplitude, and reported the one perceived as stronger. For each stimulus duration, we determined the smallest detectable change in stimulus intensity (differential threshold) for a reference velocity of 15 deg/s. Results indicate that differential thresholds decrease with stimulus duration and asymptotically converge to a constant, positive value. This suggests that the central nervous system accumulates sensory information on self-motion over time, resulting in improved discrimination performances. Observed trends in differential thresholds are consistent with predictions based on a drift diffusion model with leaky integration of sensory evidence.

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 Dates: 2017-01
 Publication Status: Published online
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 Identifiers: DOI: 10.1371/journal.pone.0170497
eDoc: e0170497
BibTex Citekey: NestidB2017
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Title: PLoS ONE
Source Genre: Journal
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Pages: - Volume / Issue: 12 (1) Sequence Number: - Start / End Page: 1 - 14 Identifier: -