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Expertise training with novel objects leads to left-lateralized facelike electrophysiological responses

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Rossion, Bruno [UCL] Gauthier, Isabel Goffaux, Valérie [UCL] Tarr, Michael J Crommelinck, Marc [UCL]

Scalp event-related potentials (ERPs) in humans indicate that face and object processing differ approximately 170 ms following stimulus presentation, at the point of the N170 occipitotemporal component. The N170 is delayed and enhanced to inverted faces but not to inverted objects. We tested whether this inversion effect reflects early mechanisms exclusive to faces or whether it generalizes to other stimuli as a function of visual expertise. ERPs to upright and inverted faces and novel objects (Greebles) were recorded in 10 participants before and after 2 weeks of expertise training with Greebles. The N170 component was observed for both faces and Greebles. The results are consistent with previous reports in that the N170 was delayed and enhanced for inverted faces at recording sites in both hemispheres. For Greebles, the same effect of inversion was observed only for experts, primarily in the left hemisphere. These results suggest that the mechanisms underlying the electrophysiological face-inversion effect extend to visually homogeneous nonface object categories, at least in the left hemisphere, but only when such mechanisms are recruited by expertise.

Document type Article de périodique (Journal article) – Article de recherche – Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.
Access type Accès restreint
Publication date 2002
Language Anglais
Journal information "Psychological Science" - Vol. 13, no. 3, p. 250-257 (2002)
Peer reviewed yes
Publisher Sage Publications, Inc. ((United States) Thousand Oaks)
issn 0956-7976
e-issn 1467-9280
Publication status Publié
Affiliations UCL - MD/FSIO - Département de physiologie et pharmacologie
UCL - PSP/PSP - Faculté de psychologie et des sciences de l'éducation
MESH Subject Adult ; Analysis of Variance ; Belgium ; Electrophysiology ; Evoked Potentials, Visual - physiology ; Face - physiology ; Female ; Form Perception - physiology ; Humans ; Male ; Psychomotor Performance - physiology ; Reaction Time - physiology
Links
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Bibliographic reference Rossion, Bruno ; Gauthier, Isabel ; Goffaux, Valérie ; Tarr, Michael J ; Crommelinck, Marc. Expertise training with novel objects leads to left-lateralized facelike electrophysiological responses. In: Psychological Science, Vol. 13, no. 3, p. 250-257 (2002)
Permanent URL http://hdl.handle.net/2078.1/28150