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Effect of spatiotemporally changing environment on serial dependence in ensemble representations

Sangkyu Son, View ORCID ProfileJoonyeol Lee, Oh-Sang Kwon, View ORCID ProfileYee-Joon Kim
doi: https://doi.org/10.1101/2021.11.30.470662
Sangkyu Son
1Center for Cognition and Sociality, Institute for Basic Science, Daejeon, Republic of Korea
2Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon, Republic of Korea
3Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Republic of Korea
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Joonyeol Lee
2Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon, Republic of Korea
3Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Republic of Korea
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Oh-Sang Kwon
4Department of Human Engineering, UNIST, Ulsan, Republic of Korea
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Yee-Joon Kim
1Center for Cognition and Sociality, Institute for Basic Science, Daejeon, Republic of Korea
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  • ORCID record for Yee-Joon Kim
  • For correspondence: joon@ibs.re.kr
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Summary

The recent visual past has a strong impact on our current perception. Recent studies of serial dependence in perception show that low-level adaptation repels our current perception away from previous stimuli1–5 whereas post-perceptual decision attracts perceptual report toward the immediate past6–12. In their studies, these repulsive and attractive biases were observed with different task demands perturbing ongoing sequential process. Therefore, it is unclear whether the opposite biases arise naturally in navigating complex real-life environments. Here we only manipulated the environmental statistics to characterize how serially dependent perceptual decisions unfold in spatiotemporally changing visual environments. During sequential mean orientation adjustment task on the array of Gabor patches, we found that the repulsion effect dominated only when ensemble variance increased across consecutive trials whereas the attraction effect prevailed when ensemble variance decreased or remained the same. The observed attractive bias by high- to-low-variance stimuli and repulsive bias by low-to-high-variance stimuli were reinforced by the repeated exposure to the low and the high ensemble variance, respectively. Further, this variance-dependent differential pattern of serial dependence in ensemble representation remained the same regardless of whether observers had a prior knowledge of environmental statistics or not. We used a Bayesian observer model constrained by visual adaptation13,14 to provide a unifying account of both attractive and repulsive bias in perception. Our results establish that the temporal integration and segregation of visual information is flexibly adjusted through variance adaptation.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted December 02, 2021.
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Effect of spatiotemporally changing environment on serial dependence in ensemble representations
Sangkyu Son, Joonyeol Lee, Oh-Sang Kwon, Yee-Joon Kim
bioRxiv 2021.11.30.470662; doi: https://doi.org/10.1101/2021.11.30.470662
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Effect of spatiotemporally changing environment on serial dependence in ensemble representations
Sangkyu Son, Joonyeol Lee, Oh-Sang Kwon, Yee-Joon Kim
bioRxiv 2021.11.30.470662; doi: https://doi.org/10.1101/2021.11.30.470662

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