Journal of Vision - Spatial scaling factors explain eccentricity effects on face ERPs, by Rousselet, Husk, Bennett, & Sekuler

Volume 5, Number 10, Article 1, Pages 755-763

doi:10.1167/5.10.1

http://journalofvision.org/5/10/1/

ISSN 1534-7362

Spatial scaling factors explain eccentricity effects on face ERPs

Guillaume A. Rousselet	McMaster University, Department of Psychology, Neuroscience & Behaviour, Hamilton, Ontario, Canada
Jesse S. Husk	McMaster University, Department of Psychology, Neuroscience & Behaviour, Hamilton, Ontario, Canada
Patrick J. Bennett	McMaster University, Department of Psychology, Neuroscience & Behaviour, Hamilton, Ontario, Canada
Allison B. Sekuler	McMaster University, Department of Psychology, Neuroscience & Behaviour, Hamilton, Ontario, Canada

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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History

Received July 12, 2005; published November 7, 2005

Citation

Rousselet, G. A., Husk, J. S., Bennett, P. J., & Sekuler, A. B. (2005). Spatial scaling factors explain eccentricity effects on face ERPs. Journal of Vision, 5(10):1, 755-763, http://journalofvision.org/5/10/1/, doi:10.1167/5.10.1.

Keywords

face processing, object recognition, ERP, N170, spatial scaling

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