Implicit weight bias: shared neural substrates for overweight and angry facial expressions revealed by cross-adaptation.

Autor:	Luo X; School of Psychology, Guizhou Normal University, Huaxi University Town, Guian New District, Guiyang 550025China., Zhao D; School of Psychology, Guizhou Normal University, Huaxi University Town, Guian New District, Guiyang 550025China., Gao Y; School of Psychology, Georgia Institute of Technology, 654 Cherry St NW, Atlanta, GA 30332, United States., Yang Z; School of Psychology, Guizhou Normal University, Huaxi University Town, Guian New District, Guiyang 550025China., Wang D; School of Psychology, Guizhou Normal University, Huaxi University Town, Guian New District, Guiyang 550025China., Mei G; School of Psychology, Guizhou Normal University, Huaxi University Town, Guian New District, Guiyang 550025China.
Jazyk:	angličtina
Zdroj:	Cerebral cortex (New York, N.Y. : 1991) [Cereb Cortex] 2024 Apr 01; Vol. 34 (4).
DOI:	10.1093/cercor/bhae128
Abstrakt:	The perception of facial expression plays a crucial role in social communication, and it is known to be influenced by various facial cues. Previous studies have reported both positive and negative biases toward overweight individuals. It is unclear whether facial cues, such as facial weight, bias facial expression perception. Combining psychophysics and event-related potential technology, the current study adopted a cross-adaptation paradigm to examine this issue. The psychophysical results of Experiments 1A and 1B revealed a bidirectional cross-adaptation effect between overweight and angry faces. Adapting to overweight faces decreased the likelihood of perceiving ambiguous emotional expressions as angry compared to adapting to normal-weight faces. Likewise, exposure to angry faces subsequently caused normal-weight faces to appear thinner. These findings were corroborated by bidirectional event-related potential results, showing that adaptation to overweight faces relative to normal-weight faces modulated the event-related potential responses of emotionally ambiguous facial expression (Experiment 2A); vice versa, adaptation to angry faces relative to neutral faces modulated the event-related potential responses of ambiguous faces in facial weight (Experiment 2B). Our study provides direct evidence associating overweight faces with facial expression, suggesting at least partly common neural substrates for the perception of overweight and angry faces. (© The Author(s) 2024. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permission@oup.com.)
Databáze:	MEDLINE
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