Causal Inference for Spatial Constancy across Saccades.
Our ability to interact with the environment hinges on creating a stable visual world despite the continuous changes in retinal input. To achieve visual stability, the brain must distinguish the retinal image shifts caused by eye movements and shifts due to movements of the visual scene. This proces...
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Public Library of Science (PLoS)
2016-03-01
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| Series: | PLoS Computational Biology |
| Online Access: | https://journals.plos.org/ploscompbiol/article/file?id=10.1371/journal.pcbi.1004766&type=printable |
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| author | Jeroen Atsma Femke Maij Mathieu Koppen David E Irwin W Pieter Medendorp |
| author_facet | Jeroen Atsma Femke Maij Mathieu Koppen David E Irwin W Pieter Medendorp |
| author_sort | Jeroen Atsma |
| collection | DOAJ |
| description | Our ability to interact with the environment hinges on creating a stable visual world despite the continuous changes in retinal input. To achieve visual stability, the brain must distinguish the retinal image shifts caused by eye movements and shifts due to movements of the visual scene. This process appears not to be flawless: during saccades, we often fail to detect whether visual objects remain stable or move, which is called saccadic suppression of displacement (SSD). How does the brain evaluate the memorized information of the presaccadic scene and the actual visual feedback of the postsaccadic visual scene in the computations for visual stability? Using a SSD task, we test how participants localize the presaccadic position of the fixation target, the saccade target or a peripheral non-foveated target that was displaced parallel or orthogonal during a horizontal saccade, and subsequently viewed for three different durations. Results showed different localization errors of the three targets, depending on the viewing time of the postsaccadic stimulus and its spatial separation from the presaccadic location. We modeled the data through a Bayesian causal inference mechanism, in which at the trial level an optimal mixing of two possible strategies, integration vs. separation of the presaccadic memory and the postsaccadic sensory signals, is applied. Fits of this model generally outperformed other plausible decision strategies for producing SSD. Our findings suggest that humans exploit a Bayesian inference process with two causal structures to mediate visual stability. |
| format | Article |
| id | doaj-art-c6a962b42fc1410db1f4cebd64e1c381 |
| institution | DOAJ |
| issn | 1553-734X 1553-7358 |
| language | English |
| publishDate | 2016-03-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Computational Biology |
| spelling | doaj-art-c6a962b42fc1410db1f4cebd64e1c3812025-08-20T03:10:58ZengPublic Library of Science (PLoS)PLoS Computational Biology1553-734X1553-73582016-03-01123e100476610.1371/journal.pcbi.1004766Causal Inference for Spatial Constancy across Saccades.Jeroen AtsmaFemke MaijMathieu KoppenDavid E IrwinW Pieter MedendorpOur ability to interact with the environment hinges on creating a stable visual world despite the continuous changes in retinal input. To achieve visual stability, the brain must distinguish the retinal image shifts caused by eye movements and shifts due to movements of the visual scene. This process appears not to be flawless: during saccades, we often fail to detect whether visual objects remain stable or move, which is called saccadic suppression of displacement (SSD). How does the brain evaluate the memorized information of the presaccadic scene and the actual visual feedback of the postsaccadic visual scene in the computations for visual stability? Using a SSD task, we test how participants localize the presaccadic position of the fixation target, the saccade target or a peripheral non-foveated target that was displaced parallel or orthogonal during a horizontal saccade, and subsequently viewed for three different durations. Results showed different localization errors of the three targets, depending on the viewing time of the postsaccadic stimulus and its spatial separation from the presaccadic location. We modeled the data through a Bayesian causal inference mechanism, in which at the trial level an optimal mixing of two possible strategies, integration vs. separation of the presaccadic memory and the postsaccadic sensory signals, is applied. Fits of this model generally outperformed other plausible decision strategies for producing SSD. Our findings suggest that humans exploit a Bayesian inference process with two causal structures to mediate visual stability.https://journals.plos.org/ploscompbiol/article/file?id=10.1371/journal.pcbi.1004766&type=printable |
| spellingShingle | Jeroen Atsma Femke Maij Mathieu Koppen David E Irwin W Pieter Medendorp Causal Inference for Spatial Constancy across Saccades. PLoS Computational Biology |
| title | Causal Inference for Spatial Constancy across Saccades. |
| title_full | Causal Inference for Spatial Constancy across Saccades. |
| title_fullStr | Causal Inference for Spatial Constancy across Saccades. |
| title_full_unstemmed | Causal Inference for Spatial Constancy across Saccades. |
| title_short | Causal Inference for Spatial Constancy across Saccades. |
| title_sort | causal inference for spatial constancy across saccades |
| url | https://journals.plos.org/ploscompbiol/article/file?id=10.1371/journal.pcbi.1004766&type=printable |
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