1. Central factors contributing to para-contrast modulation of contour and brightness perception.
- Author
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BRUNO G. BREITMEYER, RALPH ZIEGLER, and GERT HAUSKE
- Subjects
BRIGHTNESS perception ,VISUAL perception ,VISUAL masking ,BINOCULAR vision ,EYE - Abstract
Following up on a prior study of contour and brightness processing in visual masking (Breitmeyer et al., 2006), we investigated the effects of a binocular and dichoptic para-contrast masking on the visibility of the contour and brightness of a target presented to the other eye. Combined, the results support the contributions of several cortical processes to para-contrast: (1) two central sources of inhibition, one long-latency and prolonged and the other short-latency and brief; (2) binocular rivalry suppression; and (3) a facilitatory effect peaking at different SOAs for the contour and the brightness tasks, reflecting; (4) known properties of two separate cortical systems, one a fast contour-processing pathway and the other a slower brightness-processing pathway. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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