[en] The linguistic counting system of deaf signers consists of a manual counting format that uses specific structures for number words. Interestingly, the number signs from 1 to 4 in the Belgian sign languages correspond to the finger-montring habits of hearing individuals. These hand configurations could therefore be considered as signs (i.e., part of a language system) for deaf, while they would simply be number gestures (not linguistic) for hearing controls. A Fast Periodic Visual Stimulation design was used with electroencephalography recordings to examine whether these finger-number configurations are differently processed by the brain when they are signs (in deaf signers) as compared to when they are gestures (in hearing controls). Results showed that deaf signers show stronger discrimination responses to canonical finger-montring configurations compared to hearing controls. A second control experiment furthermore demonstrated that this finding was not merely due to the experience deaf signers have with the processing of hand configurations, as brain responses did not differ between groups for finger-counting configurations. Number configurations are therefore processed differently by deaf signers, but only when these configurations are part of their language system.
Disciplines :
Neurosciences & comportement
Auteur, co-auteur :
Buyle, Margot ; Psychological Sciences Research Institute (IPSY) and Institute of NeuroScience (IoNS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
LOCHY, Aliette ; University of Luxembourg > Faculty of Humanities, Education and Social Sciences (FHSE) > Department of Behavioural and Cognitive Sciences (DBCS) > Cognitive Science and Assessment ; Psychological Sciences Research Institute (IPSY) and Institute of NeuroScience (IoNS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
Vencato, Valentina; Psychological Sciences Research Institute (IPSY) and Institute of NeuroScience (IoNS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
Crollen, Virginie; Psychological Sciences Research Institute (IPSY) and Institute of NeuroScience (IoNS), Université Catholique de Louvain, Louvain-la-Neuve, Belgium
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Stronger neural response to canonical finger-number configurations in deaf compared to hearing adults revealed by FPVS-EEG.
This work was supported by the Incentive Grant for Scientific Research (MIS, Grant no F.4505.19) and a “Projet De Recherche” (PDR, Grant no. T.0036.22.) granted by the Fund for Scientific Research–National Fund for Scientific Research (FRS–FNRS, Belgium) to VC; the Faculty of Humanities, Education and Social Sciences of the University of Luxembourg to AL; and a Wallonie Bruxelles International Excellence World Grant to MB. This study benefitted from the statistical consult of the Statistical Methodology and Computing Service, technological platform at UCLouvain–SMCS/LIDAM, UCLouvain. The authors would like to thank all the individuals who participated in this study.
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