Speed of visual processing increases with eccentricity

Marisa Carrasco; Brian McElreel; Kristina Denisova; Anna Marie Giordano

doi:10.1038/nn1079

Speed of visual processing increases with eccentricity

Marisa Carrasco, Brian McElreel, Kristina Denisova, Anna Marie Giordano

Psychology

Research output: Contribution to journal › Article › peer-review

Abstract

The visual system has a duplex design to meet conflicting environmental demands: the fovea has the resolution required to process fine spatial information, but the periphery is more sensitive to temporal properties. To investigate whether the periphery's sensitivity is partly due to the speed with which information is processed, we measured the full timecourse of visual information processing by deriving joint measures of discriminability and speed, and found that speed of information processing varies with eccentricity: processing was faster when same-size stimuli appeared at 9° than 4° eccentricity, and this difference was attenuated when the 9° stimuli were magnified to equate cortical representation size. At the same eccentricity, larger stimuli are processed more slowly. These temporal differences are greater than expected from neurophysiological constraints.

Original language	English (US)
Pages (from-to)	699-700
Number of pages	2
Journal	Nature Neuroscience
Volume	6
Issue number	7
DOIs	https://doi.org/10.1038/nn1079
State	Published - Jul 1 2003

ASJC Scopus subject areas

Neuroscience(all)

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10.1038/nn1079

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title = "Speed of visual processing increases with eccentricity",

abstract = "The visual system has a duplex design to meet conflicting environmental demands: the fovea has the resolution required to process fine spatial information, but the periphery is more sensitive to temporal properties. To investigate whether the periphery's sensitivity is partly due to the speed with which information is processed, we measured the full timecourse of visual information processing by deriving joint measures of discriminability and speed, and found that speed of information processing varies with eccentricity: processing was faster when same-size stimuli appeared at 9° than 4° eccentricity, and this difference was attenuated when the 9° stimuli were magnified to equate cortical representation size. At the same eccentricity, larger stimuli are processed more slowly. These temporal differences are greater than expected from neurophysiological constraints.",

author = "Marisa Carrasco and Brian McElreel and Kristina Denisova and Giordano, {Anna Marie}",

note = "Funding Information: We thank J.M. Hup{\'e}, M. Landy, P. Lennie, L. Maloney, D. Pelli and R. Shapley for discussions. A National Science Foundation (BCS–9910734/HCP] grant to M.C. and a National Institute of Mental Health (MH57458) grant to B.M. supported this study.",

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T1 - Speed of visual processing increases with eccentricity

AU - Carrasco, Marisa

AU - McElreel, Brian

AU - Denisova, Kristina

AU - Giordano, Anna Marie

N1 - Funding Information: We thank J.M. Hupé, M. Landy, P. Lennie, L. Maloney, D. Pelli and R. Shapley for discussions. A National Science Foundation (BCS–9910734/HCP] grant to M.C. and a National Institute of Mental Health (MH57458) grant to B.M. supported this study.

PY - 2003/7/1

Y1 - 2003/7/1

N2 - The visual system has a duplex design to meet conflicting environmental demands: the fovea has the resolution required to process fine spatial information, but the periphery is more sensitive to temporal properties. To investigate whether the periphery's sensitivity is partly due to the speed with which information is processed, we measured the full timecourse of visual information processing by deriving joint measures of discriminability and speed, and found that speed of information processing varies with eccentricity: processing was faster when same-size stimuli appeared at 9° than 4° eccentricity, and this difference was attenuated when the 9° stimuli were magnified to equate cortical representation size. At the same eccentricity, larger stimuli are processed more slowly. These temporal differences are greater than expected from neurophysiological constraints.

AB - The visual system has a duplex design to meet conflicting environmental demands: the fovea has the resolution required to process fine spatial information, but the periphery is more sensitive to temporal properties. To investigate whether the periphery's sensitivity is partly due to the speed with which information is processed, we measured the full timecourse of visual information processing by deriving joint measures of discriminability and speed, and found that speed of information processing varies with eccentricity: processing was faster when same-size stimuli appeared at 9° than 4° eccentricity, and this difference was attenuated when the 9° stimuli were magnified to equate cortical representation size. At the same eccentricity, larger stimuli are processed more slowly. These temporal differences are greater than expected from neurophysiological constraints.

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Speed of visual processing increases with eccentricity

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