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| Research article summary (published 30 Mar 2003): |
Microsaccades uncover the orientation of covert attention.
Full Abstract
Fixational eye movements are subdivided into tremor, drift, and microsaccades. All three types of miniature eye movements generate small random displacements of the retinal image when viewing a stationary scene. Here we investigate the modulation of microsaccades by shifts of covert attention in a classical spatial cueing paradigm. First, we replicate the suppression of microsaccades with a minimum rate about 150 ms after cue onset. Second, as a new finding we observe microsaccadic enhancement with a maximum rate about 350 ms after presentation of the cue. Third, we find a modulation of the orientation towards the cue direction. These multiple influences of visual attention on microsaccades accentuate their role for visual information processing. Furthermore, our results suggest that microsaccades can be used to map the orientation of visual attention in psychophysical experiments.
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Author information
Author/s: Engbert, Ralf (R); Kliegl, Reinhold (R);
Affiliation: Department of Psychology, University of Potsdam, P.O. Box 601553, 14415, Potsdam, Germany. engbert(-atsign-)rz.uni-potsdam.de
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Vision research (Vision Res), published in England. (Language: eng)
Reference: 2003-Apr; vol 43 (issue 9) : pp 1035-45
Dates: Created 2003/04/04; Completed 2003/07/21; Revised 2006/11/15;
PMID: 12676246, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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