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

Searching for impossible objects: processing form and attributes in early vision
Searching for impossible objects: processing form and attributes in early vision
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.
675-690
Donnelly, Nick
05c83b6b-ee8d-4c9d-85dc-c5dcd6b5427b
Found, Andrew
67aef2d3-7fa6-442e-a1c7-e09a6c5adc11
Muller, Hermann J.
b1adcbdf-d9aa-47e4-941d-a3682133cf80
Donnelly, Nick
05c83b6b-ee8d-4c9d-85dc-c5dcd6b5427b
Found, Andrew
67aef2d3-7fa6-442e-a1c7-e09a6c5adc11
Muller, Hermann J.
b1adcbdf-d9aa-47e4-941d-a3682133cf80

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.

Record type: Article

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 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.

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Published date: 1999

Identifiers

Local EPrints ID: 18512
URI: http://eprints.soton.ac.uk/id/eprint/18512
PURE UUID: a15a99a2-b23d-4be9-a71d-7b475ea17908

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Date deposited: 12 Dec 2005
Last modified: 15 Jul 2019 19:28

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