Poor peripheral binding depends in part on stimulus color
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Poor peripheral binding depends in part on stimulus color Karen L. Gunther 1 & Mason R. McKinney 1
# The Psychonomic Society, Inc. 2020
Abstract We have compared two explanations for poor peripheral binding. Binding is the ability to assign the correct features (e.g., color, direction of motion, orientation) to objects. Wu, Kanai, and Shimojo (Nature, 429(6989), 262, 2004) showed that subjects performed poorly on binding dot color with direction of motion in the periphery. Suzuki, Wolfe, Horowitz, and Noguchi (Vision Research, 82, 58–65, 2013) similarly showed that subjects had trouble binding color with line orientation in the periphery. These authors concluded that performance in the periphery was poor because binding is poor in the periphery. However, both studies used red and green stimuli. We tested an alternative hypothesis, that poor peripheral binding is in part due to poor peripheral red/green color vision. Eccentricity-dependent changes in visual processing cause peripheral red/green vision to be worse than foveal vision. In contrast, blue/yellow vision remains centrifugally more stable. We tested 9 subjects in a replication and extension of Suzuki and colleagues’ line orientation judgment, in red and green, and in blue and yellow. There were three central conditions: (1) red (or blue) all horizontal, green (or yellow) all vertical; (2) red (or blue) all vertical, green (or yellow) all horizontal; or (3) random pairing of color and orientation. In both the red/green and the blue/yellow color schemes, peripheral performance was influenced by central line orientation, replicating Suzuki and colleagues. However, the effect with blue/yellow lines was smaller, indicating that poor peripheral “binding,” as hypothesized by both Wu and colleagues and Suzuki and colleagues, is due in part to their use of red and green stimuli.
Keywords Binding . Peripheral vision . Color vision
People use their visual systems in order to view the world and navigate through the environment. However, visual acuity is far from being perfect, especially in the periphery. In order to limit neural resources, stimuli from the periphery of our field of view are processed at lower resolution than are stimuli from the center of our field of view, a phenomenon known as cortical magnification (e.g., Levi, Klein, & Aitsebaomo, 1985). Wu et al. (2004) examined the ability of subjects to bind the features of color and direction of motion correctly in the periphery. They found that subjects were greatly influenced by the alignment of features of stimuli presented centrally, perhaps because subjects were attempting to resolve the peripheral uncertainty by using information from the perceptually more robust central stimuli. Wu and colleagues found that red central dots moving up with green central dots moving
* Karen L. Gunther [email protected] 1
Department of Psychology, Wabash College, 301 West Wabash Avenue, Crawfordsville, IN 47933, USA
down induced a red-up/green-down binding percept in peripheral red-down/green-up dots. Similarly, S
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