Backward masking is not required to elicit the central performance drop
| Autor: | Rick Gurnsey, Cindy Potechin |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Spatial vision
business.industry media_common.quotation_subject Drop (liquid) Parafovea Oblique line Experimental and Cognitive Psychology Models Biological Retina Pattern Recognition Visual Perception Spatial noise Humans Visual Pathways Computer vision Segmentation Computer Vision and Pattern Recognition Artificial intelligence Visual Fields Psychology business Perceptual Masking Photic Stimulation Backward masking media_common |
| Zdroj: | Spatial Vision. 16:393-406 |
| ISSN: | 1568-5683 |
| DOI: | 10.1163/156856803322552720 |
| Popis: | In some circumstances, texture discrimination performance peaks in the parafovea rather than at the fovea. Kehrer (1987) referred to this phenomenon as the central performance drop (CPD). In most studies showing the CPD, task performance has been limited by a backward mask. Morikawa (2000) has argued that in these studies the backward mask was critical to the emergence of the CPD. In three studies we use textures comprising left and right oblique line segments and limit performance by manipulating the orientation variability within the foreground and background textures. Using this method we demonstrate that significant CPDs emerge whether or not there is a backward mask. We conclude that in past studies of the CPD the backward mask functioned primarily as a source of spatial noise and that its temporal relation to the texture display is not critical to the emergence of the CPD. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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