AI Article Synopsis
- ERP studies have identified a face-sensitive response called the N170, which is strongest at the center of vision (fovea) and diminishes with distance from it.
- The decrease in response with eccentricity hints at a potential bias in the brain areas that process faces.
- Adjusting the size of stimuli based on the visual system's scaling shows that these eccentricity effects are mainly due to basic visual factors rather than a specific preference for foveal processing in face recognition.
Article Abstract
Event-related potential (ERP) studies consistently have described a strong, face-sensitive response termed the N170. This component is maximal at the fovea and decreases strongly with eccentricity, a result that could suggest a foveal bias in the cortical generators responsible for face processing. Here we demonstrate that scaling stimulus size according to V1 cortical magnification factor can virtually eliminate face-related eccentricity effects, indicating that eccentricity effects on face ERPs are largely due to low-level visual factors rather than high-level cortical specialization for foveal stimuli.
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| http://dx.doi.org/10.1167/5.10.1 | DOI Listing |
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