Grouping puts figure-ground assignment in context by constraining propagation of edge assignment.

Brooks, Joseph L and Driver, Jon (2010) Grouping puts figure-ground assignment in context by constraining propagation of edge assignment. Attention, perception & psychophysics, 72 (4). pp. 1053-1069. ISSN 1943-393X. (Full text available)

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http://dx.doi.org/10.3758/APP.72.4.1053

Abstract

Figure-ground organization involves the assignment of edges to a figural shape on one or the other side of each dividing edge. Established visual cues for edge assignment primarily concern relatively local rather than contextual factors. In the present article, we show that an assignment for a locally unbiased edge can be affected by an assignment of a remote contextual edge that has its own locally biased assignment. We find that such propagation of edge assignment from the biased remote context occurs only when the biased and unbiased edges are grouped. This new principle, whereby grouping constrains the propagation of figural edge assignment, emerges from both subjective reports and an objective short-term edge-matching task. It generalizes from moving displays involving grouping by common fate and collinearity, to static displays with grouping by similarity of edge-contrast polarity, or apparent occlusion. Our results identify a new contextual influence on edge assignment. They also identify a new mechanistic relation between grouping and figure-ground processes, whereby grouping between remote elements can constrain the propagation of edge assignment between those elements. Supplemental materials for this article may be downloaded from http://app.psychonomic-journals.org/content/supplemental.

Item Type: Article
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculties > Social Sciences > School of Psychology
Faculties > Social Sciences > School of Psychology > Cognitive Psychology
Depositing User: Joseph Brooks
Date Deposited: 29 Mar 2012 00:12
Last Modified: 02 Jul 2014 11:08
Resource URI: http://kar.kent.ac.uk/id/eprint/29184 (The current URI for this page, for reference purposes)
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