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Clément, Fabrice

Nom
Clément, Fabrice
Affiliation principale
Fonction
Professeur.e ordinaire
Email
fabrice.clement@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/579
_
0000-0002-6319-4362

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  • Publication
    Accès libre
    Am I really seeing what’s around me? An ERP study on social anxiety under speech induction, uncertainty and social feedback
    (2022-2-9)
    Tipura, Eda
    ;
    Zanesco, Julie 
    ;
    Clément, Fabrice 
    ;
    Renaud, Olivier
    ;
    Pegna, Alan J.
    Cognitive models of social anxiety propose that socially anxious individuals engage in excessive self-focusing attention when entering a social situation. In the present study, speech anxiety was induced to socially anxious and control participants. Event-related potentials were recorded while participants performed a perceptual judgement task using distinct or ambiguous stimuli, before and after social feedback. Disputed feedback led to more revisions and decreased levels of confidence, especially among socially anxious individuals. Prior feedback, greater occipital P1 amplitudes in both groups for ambiguous probes indicated heightened sensory facilitation to ambiguous information, and greater anterior N1 amplitudes for ambiguous stimuli in highly anxious participants suggested anticipation of negative feedback in this group. Post-feedback, P1, N1 and LPP amplitudes were reduced overall among socially anxious individuals indicating a reduction in sensory facilitation of visual information. These results suggest excessive self-focusing among socially anxious in- dividuals, possibly linked to anticipation of an anxiety-provoking social situation.
  • Publication
    Accès libre
    Seeing is believing: Early perceptual brain processes are modified by social feedback
    (2018-8-23)
    Zanesco, Julie 
    ;
    Tipura, Eda
    ;
    Posada, Andres
    ;
    Clément, Fabrice 
    ;
    Pegna, Alan J.
    Over 6 decades ago, experimental evidence from social psychology revealed that individuals could alter their responses in perceptual judgement tasks if they differed from the prevailing view emitted by a group of peers. Responses were thus modulated to agree with the opinion of the social group. An open question remains whether such changes actually reflect modified perception, or whether they are simply the result of a feigned agreement, indicating submissive acceptance. In this study, we addressed this topic by performing a perceptual task involving the assessment of ambiguous and distinct stimuli. Participants were asked to judge the colours of squares, before, and after receiving feedback for their response. In order to pinpoint the moment in time that social feedback affected neural processing, ERP components to ambiguous stimuli were compared before and after participants received supposed social feedback that agreed with, or disputed their response. The comparison revealed the presence of differences beginning already 100ms after stimulus presentation (on the P1 and N1 components) despite otherwise identical stimuli. The modulation of these early components, normally thought to be dependent on low-level visual features, demonstrate that social pressure tangibly modifies early perceptual brain processes.