Searching for impossible objects: Processing form and attributes in early vision

Donnelly, Nick and Found, Andrew and Muller, Hermann J. (1999) Searching for impossible objects: Processing form and attributes in early vision. Perception & Psychophysics, 61 (4). pp. 675-690. ISSN 0031-5117. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.3758/BF03205538

Abstract

In five experiments, we investigated the extent to which form (shape) and metric attributes (three-dimensional, 3-D, orientation), both defined by relations between line elements, are processed in early vision. Search for a target defined by an abstract property of form (i.e., impossibility) was slow and serial. In contrast, search for a 3-D orientation target was considerably easier. Subsequent experiments suggest that this difference reflects the fact that 3D orientation is derivable from localized sets of lines, whereas impossibility is an idiosyncratic property of the complete set of relations between lines. We conclude that only "gross" aspects of form are available in early vision as the complete set of line relations is not processed preattentively. However, localized processing of line relations is sufficient to derive 3-D orientation.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Social Sciences > School of Psychology
Depositing User: M. Nasiriavanaki
Date Deposited: 21 Jun 2009 13:14
Last Modified: 07 May 2014 09:05
Resource URI: http://kar.kent.ac.uk/id/eprint/17302 (The current URI for this page, for reference purposes)
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