首页|Probing the processing of facial expressions in monkeys via time perception and eye tracking

Probing the processing of facial expressions in monkeys via time perception and eye tracking

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Accurately recognizing facial expressions is essential for effective social interactions.Non-human primates(NHPs)are widely used in the study of the neural mechanisms underpinning facial expression processing,yet it remains unclear how well monkeys can recognize the facial expressions of other species such as humans.In this study,we systematically investigated how monkeys process the facial expressions of conspecifics and humans using eye-tracking technology and sophisticated behavioral tasks,namely the temporal discrimination task(TDT)and face scan task(FST).We found that monkeys showed prolonged subjective time perception in response to Negative facial expressions in monkeys while showing longer reaction time to Negative facial expressions in humans.Monkey faces also reliably induced divergent pupil contraction in response to different expressions,while human faces and scrambled monkey faces did not.Furthermore,viewing patterns in the FST indicated that monkeys only showed bias toward emotional expressions upon observing monkey faces.Finally,masking the eye region marginally decreased the viewing duration for monkey faces but not for human faces.By probing facial expression processing in monkeys,our study demonstrates that monkeys are more sensitive to the facial expressions of conspecifics than those of humans,thus shedding new light on inter-species communication through facial expressions between NHPs and humans.

MonkeyFacial expressionTime perceptionEye-trackingPupil size

Xin-He Liu、Lu Gan、Zhi-Ting Zhang、Pan-Ke Yu、Ji Dai

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Shenzhen Technological Research Center for Primate Translational Medicine,Shenzhen-Hong Kong Institute of Brain Science,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen,Guangdong 518055,China

CAS Key Laboratory of Brain Connectome and Manipulation,Brain Cognition and Brain Disease Institute,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen,Guangdong 518055,China

Guangdong Provincial Key Laboratory of Brain Connectome and Behavior,Shenzhen Institute

Research Center for Medical Artificial Intelligence,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen,Guangdong 518055,China

University of Chinese Academy of Sciences,Beijing 100049,China

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National Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research FoundationYouth Innovation Promotion Association of Chinese Academy of SciencesShenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research InstitutionsShenzhen Technological Research Center for Primate Translational Medicine

U20A20172022A15150101342022A15151105982017120NYKFKT2019009F-2021-Z99-504979

2023

10.24272/j.issn.2095-8137.2023.003

动物学研究
中国科学院昆明动物研究所 中国动物学会

动物学研究

CSTPCDCSCD
影响因子：0.582
ISSN：0254-5853
年,卷(期)：2023.44(5)
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