Lateral interactions between spatial channels: Suppression and facilitation revealed by lateral masking experiments
Abstract
We measured contrast detection thresholds for a foveal Gabor signal flanked by two high contrast Gabor signals. The spatially localized target and masks enabled investigation of space dependent lateral interactions between foveal and neighboring spatial channels. Our data show a suppressive region extending to a radius of two wavelengths, in which the presence of the masking signals have the effect of increasing target threshold. Beyond this range a much larger facilitatory region (up to a distance of ten wavelengths) is indicated, in which contrast thresholds were found to decrease by up to a factor of two. The interactions between the foveal target and the flanking Gabor signals are spatial-frequency and orientation specific in both regions, but less specific in the suppression region.
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In flank facilitation paradigms, control subjects find it easier to detect the central element when the flanks are present than when they are absent.
“With some target-flank separations control subjects find it easier to detect the central element when the flanks are present than when they are absent (facilitation).”
From Visual perception and its impairment in schizophrenia (2008) · cites this paper as [52]
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Self-citation
- Authors
- Polat, U., & Sagi, D.
- Affiliations
- Weizmann Institute of Science (IL)
- ORCID
- Sagi, Dov
- Venue
- Vision Research
- Publisher
- Elsevier BV
- Published
- 1993-05
- Volume
- 33
- Issue
- 7
- Pages
- 993-999
- ISSN
- 0042-6989 (ISSN-L)
- OpenAlex
- W2149316826
- Cited by
- 818
- References
- 32
- Citations by year
- 2026: 5 · 2025: 20 · 2024: 9 · 2023: 10 · 2022: 14 · 2021: 9 · 2020: 17 · 2019: 16 · 2018: 18 · 2017: 17 · 2016: 19 · 2015: 24 · 2014: 39 · 2013: 20 · 2012: 26
- FWCI
- 8.05
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Vision Research (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Face Recognition and Perception
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Visual Attention and Saliency Detection
- Keywords
- lateral interactions, lateral masking, contrast threshold, foveal vision, Gabor stimuli, suppression, facilitation, orientation specificity, visual masking
- MeSH terms
- Distance Perception, Humans, Pattern Recognition, Visual, Perceptual Masking, Psychometrics, Sensory Thresholds, Contrast Sensitivity
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