Searching for impossible objects: processing form and attributes in early vision
Donnelly, Nick, Found, Andrew and Muller, Hermann J. (1999) Searching for impossible objects: processing form and attributes in early vision. Perception and Psychophysics, 61, (4), 675-690.
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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 3-D 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.
|Subjects:||B Philosophy. Psychology. Religion > BF Psychology|
|Divisions:||University Structure - Pre August 2011 > School of Psychology > Division of Cognition
|Date Deposited:||12 Dec 2005|
|Last Modified:||01 Apr 2012 00:43|
|Contributors:||Donnelly, Nick (Author)
Found, Andrew (Author)
Muller, Hermann J. (Author)
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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