期刊
EUROPEAN JOURNAL OF NEUROSCIENCE
卷 45, 期 7, 页码 932-939出版社
WILEY
DOI: 10.1111/ejn.13529
关键词
dorsomedial prefrontal cortex; in-group bias; prejudice; right cerebellum; transcranial magnetic stimulation
资金
- Fund for Investments on basic Research (FIRB), Italian Ministry of Education, University and Research [RBFR12F0BD]
We tend to express more positive judgments and behaviors toward individuals belonging to our own group compared to other (out-) groups. In this study, we assessed the role of the cerebellum and of the dorsomedial prefrontal cortex (dmPFC) - two regions critically implicated in social cognition processes - in mediating implicit valenced attitudes toward in-group and out-group individuals. To this aim, we used transcranial magnetic stimulation (TMS) in combination with a standard attitude priming task, in which Caucasian participants had to categorize the valence of a series of adjectives primed by either an in-group or an out-group face. In two behavioral experiments, we found an in-group bias (i.e. faster categorization of positive adjectives when preceded by in-group faces) but no evidence of an out-group bias. Interestingly, TMS over both the dmPFC and over the (right) cerebellum significantly interfered with the modulation exerted by group membership on adjective valence classification, abolishing the in-group bias observed at baseline. Overall, our data suggest that both the dmPFC and the cerebellum play a causal role in mediating implicit social attitudes.
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