Spatiotopic and saccade-specific transsaccadic memory for object detail

Grzeczkowski, Lukasz; Leeuwen, Jonathan van; Belopolsky, Artem V.; Deubel, Heiner

doi:10.1167/jov.20.7.2

Cited by 10 publications

(5 citation statements)

References 90 publications

(211 reference statements)

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“…In this study, we investigated the perception of shape changes during saccadic eye movements and its relationship to pre- and postsaccadic appearance of shape. Our results confirm that transsaccadic perception of shape changes underlies the same effects that apply to similar ( Deubel et al, 2002 , Experiment 3; Grzeczkowski, van Leeuwen, et al, 2020 ) and other object features: performance at intrasaccadic change detection was relatively poor under normal conditions (no-blank condition) and an accompanying postsaccadic blank facilitated change detection ( Fig. 3B ).…”

Section: Discussionsupporting

confidence: 84%

A bias in saccadic suppression of shape change

Hübner

Schütz

2021

Vision Research

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Processing of visual information in the central (foveal) and peripheral visual field is vastly different. To achieve a homogeneous representation of the visual world across eye movements, the visual system needs to compensate for these differences. By introducing subtle changes between peripheral and foveal inputs across saccades, one can test this compensation. We morphed shapes between a triangle and a circle and presented two different change directions (circularity decrease or increase) at varying magnitudes across a saccade. In a change-discrimination task, observers disproportionally often reported percepts of circularity increase. To test the relationship with visual-field differences, we measured perception when shapes were exclusively presented either in the periphery (before a saccade), or in the fovea (after a saccade). We found that overall shapes were perceived as more circular before than after a saccade and the more pronounced this difference was for a participant, the smaller was their circularity-increase bias in the change-discrimination task. We propose that visual-field differences have a direct and an indirect influence on transsaccadic perception of shape change. The direct influence is based on the distinct appearance of shape in the central and peripheral visual field in a trial, causing an increase of the perceptual magnitude of circularity-decrease changes. The indirect influence is based on long-term build-up of transsaccadic expectations; if a change is opposite (circularity increase) to the expectation (circularity decrease), it should elicit a strong error signal facilitating change detection. We discuss the concept of transsaccadic expectations and theoretical implications for transsaccadic perception of other feature changes.

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Section: Discussionsupporting

confidence: 84%

A bias in saccadic suppression of shape change

Hübner

Schütz

2021

Vision Research

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“…Consistent with previous studies (e.g. Deubel et al, 1996; Goktepe & Schütz, 2023; Grzeczkowski, Deubel, & Szinte, 2020; Grzeczkowski, van Leeuwen, et al, 2020; Hübner & Schütz, 2021; Poth & Schneider, 2016; Tas et al, 2021; Weiss et al, 2015) we observed greater precision in the blanking condition in the change discrimination task of our first experiment. However, the change direction bias was preserved in both blank and no blank conditions.…”

Section: Discussionsupporting

confidence: 93%

“…To understand the limitations and biases of change perception, it is essential to understand how information is processed across saccades. Presaccadic information about SF (Weiss et al, 2015), orientation (Ganmor et al, 2015; Grzeczkowski, Deubel, & Szinte, 2020; Stewart & Schütz, 2018; Wolf & Schütz, 2015), and other visual features of the saccade target can be transferred across saccades and integrated with postsaccadic information (shape - Demeyer et al, 2011; Grzeczkowski, van Leeuwen, et al, 2020; numerosity - Hübner & Schütz, 2017; color - Schut et al, 2018; Wijdenes et al, 2015; Wittenberg et al, 2008). At the same time, the precise nature of transsaccadic integration remains uncertain.…”

Section: Methodsmentioning

confidence: 99%

A bias in transsaccadic perception of spatial frequency changes

Sharvashidze,

Hübner,

Schütz

2024

Preprint

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Visual processing differs between the foveal and the peripheral visual field. These differences can lead to different appearances of objects in the periphery and the fovea, which poses a challenge to perception across saccades. Differences in the appearance of visual features between the peripheral and foveal visual field may bias change discrimination across saccades. Previously it has been reported that spatial frequency (SF) appears higher in the periphery compared to the fovea (Davis et al., 1987). In this study, we investigated the visual appearance of SF before and after a saccade and the discrimination of SF changes implemented during saccades. In addition, we tested the contributions of pre- and postsaccadic information to change discrimination performance. In the first experiment, we found no differences in the appearance of SF before and after a saccade. However, participants showed a clear bias to report SF increases. Interestingly, a 200-ms postsaccadic blank period improved the precision of the responses but did not affect the bias. In the second experiment, participants showed lower thresholds for SF increases than for decreases, suggesting that the bias in the first experiment was not just a response bias. Finally, we asked participants to discriminate the SF of stimuli presented before a saccade. Thresholds in the presaccadic discrimination task were lower than thresholds in the change discrimination task, suggesting that transsaccadic change discrimination is not merely limited by presaccadic discrimination in the periphery. The change direction bias might stem from more effective masking or overwriting of the presaccadic stimulus by the postsaccadic low SF stimulus.

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“…Under hierarchical models of visual processing, after an initial feedforward sweep of visual information, higher level areas, such as the frontal eye fields, use corollary discharge to provide spatiotemporally precise predictions for lower levels within the visual hierarchy ( Schall et al, 1995 ; Stanton et al, 1995 ; Grzeczkowski et al, 2020 ). This ensures that visual stimuli are aligned with their expected post-saccadic retinotopic location despite saccades interrupting the typical flow of visual information.…”

Section: Discussionmentioning

confidence: 99%

Decoding Remapped Spatial Information in the Peri-Saccadic Period

Moran,

Johnson,

Landau

et al. 2024

J. Neurosci.

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It has been suggested that, prior to a saccade, visual neurons predictively respond to stimuli that will fall in their receptive fields after completion of the saccade. This saccadic remapping process is thought to compensate for the shift of the visual world across the retina caused by eye movements. To map the timing of this predictive process in the brain, we recorded neural activity using electroencephalography (EEG) during a saccade task. Human participants (male and female) made saccades between two fixation points while covertly attending to oriented gratings briefly presented at various locations on the screen. Data recorded during trials in which participants maintained fixation were used to train classifiers on stimuli in different positions. Subsequently, data collected during saccade trials were used to test for the presence of remapped stimulus information at the post-saccadic retinotopic location in the peri-saccadic period, providing unique insight intowhenremapped information becomes available. We found that the stimulus could be decoded at the remapped location ∼180 ms post-stimulus onset, but only when the stimulus was presented 100-200 ms before saccade onset. Within this range, we found that the timing of remapping was dictated by stimulus onset rather than saccade onset. We conclude that presenting the stimulus immediately before the saccade allows for optimal integration of the corollary discharge signal with the incoming peripheral visual information, resulting in a remapping of activation to the relevant post-saccadic retinotopic neurons.Significance StatementEach eye movement leads to a shift of the visual world across the retina, such that the visual input before and after the eye movement do not match. Despite this, we perceive the visual world as stable. A predictive mechanism known as saccadic remapping is thought to contribute to this stability. We use a saccade task with time-resolved EEG decoding to obtain a fine-grained analysis of the temporal dynamics of the saccadic remapping process. Probing different stimulus-saccade latencies and an array of stimulus locations, we identify when remapped information becomes available in the visual cortex. We describe a critical window in which feedforward visual information and the preparatory motor signals interact to allow for predictive remapping of a stimulus.

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Spatiotopic and saccade-specific transsaccadic memory for object detail

Cited by 10 publications

References 90 publications

A bias in saccadic suppression of shape change

A bias in saccadic suppression of shape change

A bias in transsaccadic perception of spatial frequency changes

Decoding Remapped Spatial Information in the Peri-Saccadic Period

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