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Acta Psychologica Sinica
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An ERP Study of Disgust Processing
JIN Yi1; ZHANG Dandan2; LIU Yunzhe1; LUO Yuejia2
(1 National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, China) (2 Institute of Social and Affective Neuroscience, Shenzhen University, Shenzhen 518060, China)
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Abstract  

As one kind of threat related emotions, disgust has the evolutional meaning to help human being avoid harmful stimulus. Recent studies have demonstrated the unique neural processing mechanism of disgust, which could be described as inhibiting sensory inputs at early stage of stimulus processing. In this study, the event-related potential (ERP) technique was employed with its advantage in time resolution to learn about the neural processing when participants watching disgusting compared with neutral pictures. After watching emotional pictures presented in different lengths of time, participants were instructed to finish a visually search task in order to examine the consumptions of attentional resources under different conditions. EPR results revealed that the effect of disgust first began at 100 ms after picture onset with a suppressed waveform compared to the neutral condition while enhanced neural activity was detected at the follow-up stage of detailed processing. The behavior results showed significant interactions; the task performance was hampered by negative emotion processing when the stimulus length was shorter (0/300 ms). In contrast, there was no behavioral difference between two emotional conditions when the stimulus length was longer (600/900 ms). The current results suggest that disgust has unique neural processing mechanism which fits the tow-stage model of negative emotion processing. The results further indicate that there is transition phase existing in which both automatic processing and controlled processing activate simultaneously.

Keywords disgust      automatic processing      top-down processing      attention     
Corresponding Authors: LUO Yuejia, E-mail: luoyj@bnu.edu.cn   
Issue Date: 25 November 2014
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JIN Yi
ZHANG Dandan
LIU Yunzhe
LUO Yuejia
Cite this article:   
JIN Yi,ZHANG Dandan,LIU Yunzhe, et al. An ERP Study of Disgust Processing[J]. Acta Psychologica Sinica, 10.3724/SP.J.1041.2014.01682
URL:  
http://journal.psych.ac.cn/xlxb/EN/10.3724/SP.J.1041.2014.01682     OR     http://journal.psych.ac.cn/xlxb/EN/Y2014/V46/I11/1682
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