The role of the saccade target object in the perception of a visually stable world

Currie, Christopher B.; McConkie, George W.; Carlson-Radvansky, Laura A.; Irwin, David

doi:10.3758/bf03206914

Cited by 137 publications

(153 citation statements)

References 19 publications

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“…A number of researchers have suggested that the pre-saccadic shift of attention is integral to visual stability [41][42][43][44]. In this view, attention precedes an eye movement to allow for an accurate preview of the saccade target.…”

Section: The Assumption Of Stabilitymentioning

confidence: 99%

Visual attention and stability

Mathôt

Theeuwes

2011

Phil. Trans. R. Soc. B

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In the present review, we address the relationship between attention and visual stability. Even though with each eye, head and body movement the retinal image changes dramatically, we perceive the world as stable and are able to perform visually guided actions. However, visual stability is not as complete as introspection would lead us to believe. We attend to only a few items at a time and stability is maintained only for those items. There appear to be two distinct mechanisms underlying visual stability. The first is a passive mechanism: the visual system assumes the world to be stable, unless there is a clear discrepancy between the pre-and post-saccadic image of the region surrounding the saccade target. This is related to the pre-saccadic shift of attention, which allows for an accurate preview of the saccade target. The second is an active mechanism: information about attended objects is remapped within retinotopic maps to compensate for eye movements. The locus of attention itself, which is also characterized by localized retinotopic activity, is remapped as well. We conclude that visual attention is crucial in our perception of a stable world.

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Section: The Assumption Of Stabilitymentioning

confidence: 99%

Visual attention and stability

Mathôt

Theeuwes

2011

Phil. Trans. R. Soc. B

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“…In more recent work, we (Deubel and Schneider, 1994;Deubel et al, , 1998) developed a 'reference object theory' that assumes that pre-and postsaccadic visual 'snapshots' are linked by means of the saccade target which is assumed by the visual system as being stable. In a very similar theoretical approach, the 'saccade target theory ' (McConkie and Currie, 1996;Currie et al, 2000) also assigns a privileged status to the object that constitutes the target for the saccade. Both theories assume that with each new fixation the visual system runs through a sequence of processing steps which starts with the selection of one object as the target for the next saccade.…”

Section: Is There a Special Role For The Saccade Target?mentioning

confidence: 99%

“…In scenes consisting of only two objects like in the experiments of and Verfaillie and De Graef (2000) it is likely that both objects are attended before the saccade, so both stimuli are encoded with sufficient accuracy in transsaccadic memory. The more complex stimuli of Irwin (1992), McConkie and Currie (1996) and Currie et al (2000), however, exceed the capacity of the visual memory; hence only a selected subset of the stimuli, preferentially around the saccade target area, will be still in memory for further processing after the saccade.…”

Section: Is There a Special Role For The Saccade Target?mentioning

confidence: 99%

“…McConkie and Currie found that the detectability of these image changes was a direct function of the displacement size at the location where the eyes landed, confirming the importance of the local region around the saccade target. Finally, Currie et al (2000), also using full-colour pictures of natural scenes, studied the detectability of intrasaccadic displacements of objects in the display. They found that displacements of the saccade target object were much easier to detect than displacements of the background (with the saccade target object remaining stationary).…”

Section: Is There a Special Role For The Saccade Target?mentioning

confidence: 99%

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Transsaccadic memory of position and form

Deubel

Schneider

Bridgeman

2002

The Brain's Eye: Neurobiological and Clinical Aspects of Oculomotor Research

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Why and how people perceive the visual world as continuous and stable, despite the gross changes of its retinal projection that occur with each saccade, is one of the classic problems in perception. In the present paper, we argue that an important factor of visual stability and transsaccadic perception is formed by the reafferent visual information, i.e., the visual display that is present when the eyes land. After a review of some of the relevant theoretical, behavioural and physiological research on space constancy, saccadic suppression and transsaccadic memory, three experiments are presented. In a first experiment, we study the effect of an extended horizontal bar covering the target area for a short period after the saccade on saccadic suppression of image displacement. The results show that the bar acts just like a temporary blanking of the saccade target, leading to a strong reduction of saccadic suppression. In the second experiment, we show that any object that is present immediately after the saccade can establish a spatial reference, even if it is dissimilar to the saccade target. In a third experiment we study, with a similar approach, the effect of blanking and postsaccadic information on transsaccadic integration of form information. The data demonstrate that a localized postsaccadic object tends to replace the content of transsaccadic memory.

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“…(a) Object reference theory The object reference theory [30] and the saccade target theory [31,72] rely on visual information for space constancy and ascribe a particular role to the saccade target. They suggest that most of the visual information before the saccade is discarded, and that a new representation of the visual world is generated from new incoming information after the saccade [73].…”

Section: Theories and Computational Models Of Peri-and Trans-saccadicmentioning

confidence: 99%

Computational models of spatial updating in peri-saccadic perception

Hamker

Zirnsak

Ziesche

et al. 2011

Phil. Trans. R. Soc. B

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Perceptual phenomena that occur around the time of a saccade, such as peri-saccadic mislocalization or saccadic suppression of displacement, have often been linked to mechanisms of spatial stability. These phenomena are usually regarded as errors in processes of trans-saccadic spatial transformations and they provide important tools to study these processes. However, a true understanding of the underlying brain processes that participate in the preparation for a saccade and in the transfer of information across it requires a closer, more quantitative approach that links different perceptual phenomena with each other and with the functional requirements of ensuring spatial stability. We review a number of computational models of peri-saccadic spatial perception that provide steps in that direction. Although most models are concerned with only specific phenomena, some generalization and interconnection between them can be obtained from a comparison. Our analysis shows how different perceptual effects can coherently be brought together and linked back to neuronal mechanisms on the way to explaining vision across saccades.

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The role of the saccade target object in the perception of a visually stable world

Cited by 137 publications

References 19 publications

Visual attention and stability

Visual attention and stability

Transsaccadic memory of position and form

Computational models of spatial updating in peri-saccadic perception

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