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Apparent motion during saccadic suppression periods

  • Sensitivity to many visual stimuli, and, in particular, image displacement, is reduced during a change in fixation (saccade) compared to when the eye is still. In these experiments, we studied the sensitivity of observers to ecologically relevant image translations of large, complex, real world scenes either during horizontal saccades or during fixation. In the first experiment, we found that such displacements were much less detectable during saccades than during fixation. Qualitatively, even when trans-saccadic scene changes were detectible, they were less salient and appeared slower than equivalent changes in the absence of a saccade. Two further experiments followed up on this observation and estimated the perceived magnitude of trans-saccadic apparent motion using a two-interval forced-choice procedure (Experiment 2) and a magnitude estimation procedure (Experiment 3). Both experiments suggest that trans-saccadic displacements were perceived as smaller than equivalent inter-saccadic displacements. We conclude that during saccades, the magnitude of the apparent motion signal is attenuated as well as its detectability.

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Metadaten
Document Type:Article
Language:English
Parent Title (English):Exp Brain Res. (Experimental Brain Research)
Volume:202
Issue:1
First Page:155
Last Page:169
ISSN:0014-4819
DOI:https://doi.org/10.1007/s00221-009-2120-y
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=20024650
Publisher:Springer
Date of first publication:2009/12/19
Tag:Displacement; Motion; Saccades; Saccadic suppression; Visual perception
Departments, institutes and facilities:Fachbereich Informatik
Institute of Visual Computing (IVC)
Dewey Decimal Classification (DDC):0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 004 Datenverarbeitung; Informatik
Entry in this database:2015/04/02