Time course and robustness of ERP object and face differences

Rousselet, G.A. , Husk, J.S., Bennett, P.J. and Sekuler, A.B. (2008) Time course and robustness of ERP object and face differences. Journal of Vision, 8(12), Art. 3. (doi: 10.1167/8.12.3)

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Abstract

Conflicting results have been reported about the earliest “true” ERP differences related to face processing, with the bulk of the literature focusing on the signal in the first 200 ms after stimulus onset. Part of the discrepancy might be explained by uncontrolled low-level differences between images used to assess the timing of face processing. In the present experiment, we used a set of faces, houses, and noise textures with identical amplitude spectra to equate energy in each spatial frequency band. The timing of face processing was evaluated using face–house and face–noise contrasts, as well as upright-inverted stimulus contrasts. ERP differences were evaluated systematically at all electrodes, across subjects, and in each subject individually, using trimmed means and bootstrap tests. Different strategies were employed to assess the robustness of ERP differential activities in individual subjects and group comparisons. We report results showing that the most conspicuous and reliable effects were systematically observed in the N170 latency range, starting at about 130–150 ms after stimulus onset.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Rousselet, Dr Guillaume
Authors: Rousselet, G.A., Husk, J.S., Bennett, P.J., and Sekuler, A.B.
Subjects:B Philosophy. Psychology. Religion > BF Psychology
College/School:College of Science and Engineering > School of Psychology
College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
Journal Name:Journal of Vision
Publisher:Association for Research in Vision and Ophthalmology
ISSN:1534-7362
ISSN (Online):1534-7362
Published Online:16 September 2008
Copyright Holders:Copyright © 2008 Rousselet et. al.
First Published:First published in Journal of Vision 8(12):3
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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