Patterns of neural response in face regions are predicted by low-level image properties

Weibert, Katja and Flack, Tessa and Young, Andrew W. and Andrews, Timothy J. (2018) Patterns of neural response in face regions are predicted by low-level image properties. Cortex, 103 . pp. 199-210. ISSN 0010-9452

Full content URL: http://doi.org/10.1016/j.cortex.2018.03.009

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Patterns of neural response in face regions are predicted by low-level image properties

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Abstract

Models of face processing suggest that the neural response in different face regions is selective for higher-level attributes of the face, such as identity and expression. However, it remains unclear to what extent the response in these regions can also be explained by more basic organizing principles. Here, we used fMRI-MVPA to ask whether spatial patterns of response in the core face regions (OFA, FFA, STS) can be predicted across different participants by lower level properties of the stimulus. First, we compared the neural response to face identity and viewpoint, by showing images of different identities from different viewpoints. The patterns of neural response in the core face regions were predicted by the viewpoint, but not the identity of the face. Next, we compared the neural response to viewpoint and expression, by showing images with different expressions from different viewpoints. Again, viewpoint, but not expression, predicted patterns of response in face regions. Finally, we show that the effect of viewpoint in both experiments could be explained by changes in low-level image properties. Our results suggest that a key determinant of the neural representation in these core face regions involves lower-level image properties rather than an explicit representation of higher-level attributes in the face. The advantage of a relatively image-based representation is that it can be used flexibly in the perception of faces.

Additional Information:The final published version of this article can be accessed online at https://www.sciencedirect.com/science/article/pii/S001094521830090X?via%3Dihub
Keywords:face, viewpoint, identity, fMRI, MVPA
Subjects:C Biological Sciences > C830 Experimental Psychology
B Subjects allied to Medicine > B140 Neuroscience
Divisions:College of Social Science > School of Psychology
ID Code:32855
Deposited On:13 Sep 2018 14:28

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