Detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade target
Retinal image displacements caused by saccadic eye movements are generally unnoticed. Recent theories have proposed that perceptual stability across saccades depends on a local evaluation process centered on the saccade target object rather than on remapping and evaluating the positions of all obje...
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Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnsys.2015.00161/full |
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doaj-8134acd013824270b51e074f0c6e941d2020-11-24T21:00:23ZengFrontiers Media S.A.Frontiers in Systems Neuroscience1662-51372015-11-01910.3389/fnsys.2015.00161154351Detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade targetDavid E. Irwin0Maria M. Robinson1University of IllinoisUniversity of IllinoisRetinal image displacements caused by saccadic eye movements are generally unnoticed. Recent theories have proposed that perceptual stability across saccades depends on a local evaluation process centered on the saccade target object rather than on remapping and evaluating the positions of all objects in a display. In 3 experiments we examined whether objects other than the saccade target also influence perceptual stability by measuring displacement detection thresholds across saccades for saccade targets and a variable number of non-saccade objects. We found that the positions of multiple objects are maintained across saccades, but with variable precision, with the saccade target object having priority in the perception of displacement, most likely because it is the focus of attention before the saccade and resides near the fovea after the saccade. The perception of displacement of objects that are not the saccade target is affected by acuity limitations, attentional limitations, and limitations on memory capacity. Unlike previous studies that have found that a postsaccadic blank improves the detection of displacement direction across saccades, we found that postsaccadic blanking hurt the detection of displacement per se by increasing false alarms. Overall, our results are consistent with the hypothesis that visual working memory underlies the perception of stability across saccades.http://journal.frontiersin.org/Journal/10.3389/fnsys.2015.00161/fullMemoryVisual AcuitySaccadic eye movementsPerceptual stabilityObject correspondence |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
David E. Irwin Maria M. Robinson |
spellingShingle |
David E. Irwin Maria M. Robinson Detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade target Frontiers in Systems Neuroscience Memory Visual Acuity Saccadic eye movements Perceptual stability Object correspondence |
author_facet |
David E. Irwin Maria M. Robinson |
author_sort |
David E. Irwin |
title |
Detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade target |
title_short |
Detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade target |
title_full |
Detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade target |
title_fullStr |
Detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade target |
title_full_unstemmed |
Detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade target |
title_sort |
detection of stimulus displacements across saccades is capacity-limited and biased in favor of the saccade target |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Systems Neuroscience |
issn |
1662-5137 |
publishDate |
2015-11-01 |
description |
Retinal image displacements caused by saccadic eye movements are generally unnoticed. Recent theories have proposed that perceptual stability across saccades depends on a local evaluation process centered on the saccade target object rather than on remapping and evaluating the positions of all objects in a display. In 3 experiments we examined whether objects other than the saccade target also influence perceptual stability by measuring displacement detection thresholds across saccades for saccade targets and a variable number of non-saccade objects. We found that the positions of multiple objects are maintained across saccades, but with variable precision, with the saccade target object having priority in the perception of displacement, most likely because it is the focus of attention before the saccade and resides near the fovea after the saccade. The perception of displacement of objects that are not the saccade target is affected by acuity limitations, attentional limitations, and limitations on memory capacity. Unlike previous studies that have found that a postsaccadic blank improves the detection of displacement direction across saccades, we found that postsaccadic blanking hurt the detection of displacement per se by increasing false alarms. Overall, our results are consistent with the hypothesis that visual working memory underlies the perception of stability across saccades. |
topic |
Memory Visual Acuity Saccadic eye movements Perceptual stability Object correspondence |
url |
http://journal.frontiersin.org/Journal/10.3389/fnsys.2015.00161/full |
work_keys_str_mv |
AT davideirwin detectionofstimulusdisplacementsacrosssaccadesiscapacitylimitedandbiasedinfavorofthesaccadetarget AT mariamrobinson detectionofstimulusdisplacementsacrosssaccadesiscapacitylimitedandbiasedinfavorofthesaccadetarget |
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