Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Discrimination of natural scenes in central and peripheral vision
AU - To, Michelle
AU - Gilchrist, I. D.
AU - Troscianko, T.
AU - Tolhurst, D. J.
PY - 2011/7/15
Y1 - 2011/7/15
N2 - We conducted suprathreshold discrimination experiments to compare how natural-scene information is processed in central and peripheral vision (16 eccentricity). Observers' ratings of the perceived magnitude of changes in naturalistic scenes were lower for peripheral than for foveal viewing, and peripheral orientation changes were rated less than peripheral colour changes. A V1-based Visual Difference Predictor model of the magnitudes of perceived foveal change was adapted to match the sinusoidal grating sensitivities of peripheral vision, but it could not explain why the ratings for changes in peripheral stimuli were so reduced. Perceived magnitude ratings for peripheral stimuli were further reduced by simultaneous presentation of flanking patches of naturalistic images, a phenomenon that could not be replicated foveally, even after M-scaling the foveal stimuli to reduce their size and the distances from the flankers. The effects of the peripheral flankers are very reminiscent of crowding phenomena demonstrated with letters or Gabor patches. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
AB - We conducted suprathreshold discrimination experiments to compare how natural-scene information is processed in central and peripheral vision (16 eccentricity). Observers' ratings of the perceived magnitude of changes in naturalistic scenes were lower for peripheral than for foveal viewing, and peripheral orientation changes were rated less than peripheral colour changes. A V1-based Visual Difference Predictor model of the magnitudes of perceived foveal change was adapted to match the sinusoidal grating sensitivities of peripheral vision, but it could not explain why the ratings for changes in peripheral stimuli were so reduced. Perceived magnitude ratings for peripheral stimuli were further reduced by simultaneous presentation of flanking patches of naturalistic images, a phenomenon that could not be replicated foveally, even after M-scaling the foveal stimuli to reduce their size and the distances from the flankers. The effects of the peripheral flankers are very reminiscent of crowding phenomena demonstrated with letters or Gabor patches. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
KW - CONTRAST SENSITIVITY
KW - Orientation
KW - Crowding
KW - OBJECT RECOGNITION
KW - EYE-MOVEMENTS
KW - PRIMARY VISUAL-CORTEX
KW - SPATIAL-FREQUENCY
KW - Colour
KW - FIELD
KW - Peripheral vision
KW - Spatial vision
KW - HUMAN STRIATE CORTEX
KW - Visual Difference Predictor model
KW - PICTORIAL INFORMATION
KW - PERCEPTION
KW - CORTICAL MAGNIFICATION
UR - http://www.scopus.com/inward/record.url?scp=79960908463&partnerID=8YFLogxK
U2 - 10.1016/j.visres.2011.05.010
DO - 10.1016/j.visres.2011.05.010
M3 - Journal article
VL - 51
SP - 1686
EP - 1698
JO - Vision Research
JF - Vision Research
SN - 0042-6989
IS - 14
ER -