Receptive fields for flexible face categorizations

Smith, M.L., Gosselin, F. and Schyns, P.G. (2004) Receptive fields for flexible face categorizations. Psychological Science, 15(11), pp. 753-761. (doi:10.1111/j.0956-7976.2004.00752.x)

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Abstract

Examining the receptive fields of brain signals can elucidate how information impinging on the former modulates the latter. We applied this time-honored approach in early vision to the higher-level brain processes underlying face categorizations. Electroencephalograms in response to face-information samples were recorded while observers resolved two different categorizations (gender, expressive or not). Using a method with low bias and low variance, we compared, in a common space of information states, the information determining behavior (accuracy and reaction time) with the information that modulates emergent brain signals associated with early face encoding and later category decision. Our results provide a time line for face processing in which selective attention to diagnostic information for categorizing stimuli (the eyes and their second-order relationships in gender categorization; the mouth in expressive-or-not categorization) correlates with late electrophysiological (P300) activity, whereas early face-sensitive occipito-temporal (N170) activity is mainly driven by the contralateral eye, irrespective of the categorization task.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Schyns, Professor Philippe and Smith, Dr Marie
Authors: Smith, M.L., Gosselin, F., and Schyns, P.G.
College/School:College of Science and Engineering > School of Psychology
College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
Journal Name:Psychological Science
ISSN:0956-7976
ISSN (Online):1467-9280
Published Online:13 October 2004

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