Title: Peripheral contour grouping and saccade targeting: The role of mirror symmetry
Authors: Sassi, MichaĆ«l ×
Demeyer, Maarten
Wagemans, Johan #
Issue Date: 2014
Publisher: Molecular Diversity Preservation International
Series Title: Symmetry vol:6 pages:1-22
Abstract: Integrating shape contours in the visual periphery is vital to our ability to locate objects and thus make targeted saccadic eye movements to efficiently explore our surroundings. We tested whether global shape symmetry facilitates peripheral contour integration and saccade targeting in three experiments, in which observers responded to a successful peripheral contour detection by making a saccade towards the target shape. The target contours were horizontally (Experiment 1) or vertically (Experiments 2 and 3) mirror symmetric. Observers responded by making a horizontal (Experiments 1 and 2) or vertical (Experiment 3) eye movement. Based on an analysis of the saccadic latency and accuracy, we conclude that the figure-ground cue of global mirror symmetry in the periphery has little effect on contour integration or on the speed and precision with which saccades are targeted towards objects. The role of mirror symmetry may be more apparent under natural viewing conditions with multiple objects competing for attention, where symmetric regions in the visual field can pre-attentively signal the presence of objects, and thus attract eye movements.
ISSN: 2073-8994
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory for Experimental Psychology
Quantitative Psychology and Individual Differences
× corresponding author
# (joint) last author

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