Home / hayden christensen dating natalie portman / Spatial updating and the maintenance of visual constancy

Spatial updating and the maintenance of visual constancy

However, other studies report that attention is updated slowly after the eye movement and that initially, attention remains in the retinotopic location despite the fact that this location is behaviorally irrelevant following the saccade (Golomb, Chun, & Mazer, ).

The goal of this paper is to resolve these two different outcomes by showing the critical role played by the presence of an object at the cued location.

In the present study, we investigated the role of a spatially constrained object at the attended location.In favor of predictive remapping occurring prior to the eye movement, several neurophysiological studies have shown activity at the predicted postsaccadic location of the target even before the saccade starts (Duhamel et al., ) eye movements.These studies have shown that even before a saccade occurs, attention moves in the opposite direction, toward retinotopic locations that will align to the target’s location in space once the saccade is completed.Neural signatures of this persisting retinotopic trace have been studied with EEG and f MRI for several different areas in human visual cortex (Golomb, Nguyen-Phuc, Mazer, Mc Carthy, & Chun, ); conversely, attention lingers at the retinotopic location and is found only later at the spatiotopic location (Golomb and colleagues).Nevertheless, one factor may explain the conflict in these results.In our research () we systematically compared scene recognition response time (RT) and accuracy patterns following observer versus scene movement across view changes ranging from 0 to 360 degrees.The results demonstrated that regardless of whether the scene was rotated or the observer moved, greater angular disparity between judged and encoded views produced slower RTs.We find an attentional benefit at the spatiotopic location of the cue only when the object (the placeholder) has been continuously present at that location.We conclude that the presence of an object at the attended location is a critical factor for the maintenance of spatial constancy of attention across eye movements, a finding that helps to reconcile previous conflicting results.Golomb and colleagues (Golomb, Pulido, et al., ) have examined a case where a visual reference (a faint grid covering the whole display) was present throughout the trial and may have helped anchor a spatiotopic allocation.However, their grid encompassed both the retinotopic or spatiotopic locations and, possibly as a consequence, yielded mixed results.

603 comments

Leave a Reply

Your email address will not be published. Required fields are marked *

*