Article (Scientific journals)
Does automatic human face categorization depend on head orientation?
Or, Charles C-F; RETTER, Talia; Rossion, Bruno
2021In Cortex: A Journal Devoted to the Study of the Nervous System and Behavior, 141, p. 94 - 111
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Abstract :
[en] Whether human categorization of visual stimuli as faces is optimal for full-front views, best revealing diagnostic features but lacking depth cues, remains largely unknown. To address this question, we presented 16 human observers with unsegmented natural images of different living and non-living objects at a fast rate (f = 12 Hz), with natural face images appearing at f/9 = 1.33 Hz. Faces posing all full-front or at ¾ side view angles appeared in separate sequences. Robust frequency-tagged 1.33 Hz (and harmonic) occipito-temporal electroencephalographic (EEG) responses reflecting face-selective neural activity did not differ in overall amplitude between full-front and ¾ side views. Despite this, alternating between full-front and ¾ side views within a sequence led to significant responses at specific harmonics of .67 Hz (f/18), objectively isolating view-dependent face-selective responses over occipito-temporal regions. Critically, a time-domain analysis showed that these view-dependent face-selective responses reflected only an earlier response to full-front than ¾ side views by 8-13 ms. Overall, these findings indicate that the face-selective neural representation is as robust for ¾ side faces as for full-front faces in the human brain, but full-front views provide a slightly earlier processing-time advantage as compared to rotated face views.
Disciplines :
Neurosciences & behavior
Author, co-author :
Or, Charles C-F ;  Division of Psychology, School of Social Sciences, Nanyang Technological University, Singapore, Psychological Sciences Research Institute & Institute of Neuroscience, University of Louvain, Belgium. Electronic address: charlesor@ntu.edu.sg
RETTER, Talia  ;  University of Luxembourg > Faculty of Humanities, Education and Social Sciences (FHSE) > Department of Behavioural and Cognitive Sciences (DBCS) > Cognitive Science and Assessment ; Psychological Sciences Research Institute & Institute of Neuroscience, University of Louvain, Belgium
Rossion, Bruno ;  Psychological Sciences Research Institute & Institute of Neuroscience, University of Louvain, Belgium, Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France, CHRU-Nancy, Service de Neurologie, F-54000 Nancy, France
External co-authors :
yes
Language :
English
Title :
Does automatic human face categorization depend on head orientation?
Publication date :
August 2021
Journal title :
Cortex: A Journal Devoted to the Study of the Nervous System and Behavior
ISSN :
0010-9452
eISSN :
1973-8102
Publisher :
Masson SpA, Italy
Volume :
141
Pages :
94 - 111
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
European Research Council
European Research Council
Australian Cancer Research Foundation
Ministry of Education - Singapore
Fonds De La Recherche Scientifique - FNRS
Nanyang Technological University
Funding text :
This work was supported by Singapore MOE AcRF Grant 2019-T1-001-060, NTU HASS Start-Up Grant, and F.R.S.-FNRS postdoctoral fellowship (FC 2773) to C. O., AcRF Grant 2018-T1-001-069 to C. O. & B. R., F.R.S.-FNRS doctoral grant to T. L. R. (FC 7159), and ERC grant to B. R. (facessvep 284025). We thank Denise Lim for generating Supplementary Video.
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