Overreliance on thematic knowledge in ...
Type de document :
Article dans une revue scientifique: Article original
PMID :
URL permanente :
Titre :
Overreliance on thematic knowledge in semantic dementia: Evidence from an eye-tracking paradigm.
Auteur(s) :
Merck, Catherine [Auteur]
Noël, Audrey [Auteur]
Jamet, Eric [Auteur]
Robert, Maxime [Auteur]
Salmon, Anne [Auteur]
Belliard, Serge [Auteur]
Kalenine, Solene [Auteur]
Laboratoire Sciences Cognitives et Sciences Affectives - UMR 9193 [SCALab]
Noël, Audrey [Auteur]
Jamet, Eric [Auteur]
Robert, Maxime [Auteur]
Salmon, Anne [Auteur]
Belliard, Serge [Auteur]
Kalenine, Solene [Auteur]
Laboratoire Sciences Cognitives et Sciences Affectives - UMR 9193 [SCALab]
Titre de la revue :
Neuropsychology
Nom court de la revue :
Neuropsychology
Date de publication :
2020-01-16
ISSN :
1931-1559
Discipline(s) HAL :
Sciences cognitives
Résumé en anglais : [en]
The present study explored two types of semantic relationships in semantic dementia (SD), that rely on functionally and neuroanatomically distinct semantic systems (taxonomic vs. thematic). We used the visual world paradigm ...
Lire la suite >The present study explored two types of semantic relationships in semantic dementia (SD), that rely on functionally and neuroanatomically distinct semantic systems (taxonomic vs. thematic). We used the visual world paradigm coupled with eye-movement recordings, to gain an implicit, fine-grained and dynamic measure of semantic processing. Nine patients with SD and 15 healthy controls performed a simple word-to-picture matching task in which they had to identify each target among semantically related (taxonomic or thematic) competitors and unrelated distractors. We demonstrated different patterns of gaze fixations between patients with SD and controls: while patients with SD and controls were similarly sensitive to competition from taxonomically related pictures, patients with SD were far more sensitive than controls to thematically related competitors before identifying the targets. Moreover, most of the confusion errors made by patients with SD involved taxonomic distractors rather than thematic ones. We interpreted these findings as reflecting a semantic disequilibrium in SD, with increasing overreliance on thematic knowledge as taxonomic knowledge gradually deteriorates. We concluded that thematic relationships constitute a set of residual semantic knowledge and that their exaggerated activation in SD might certainly deserve further explorations to determine their specific role in this disease and notably, their influence on patients' abilities to deal with daily living activities. (PsycINFO Database Record (c) 2020 APA, all rights reserved).Lire moins >
Lire la suite >The present study explored two types of semantic relationships in semantic dementia (SD), that rely on functionally and neuroanatomically distinct semantic systems (taxonomic vs. thematic). We used the visual world paradigm coupled with eye-movement recordings, to gain an implicit, fine-grained and dynamic measure of semantic processing. Nine patients with SD and 15 healthy controls performed a simple word-to-picture matching task in which they had to identify each target among semantically related (taxonomic or thematic) competitors and unrelated distractors. We demonstrated different patterns of gaze fixations between patients with SD and controls: while patients with SD and controls were similarly sensitive to competition from taxonomically related pictures, patients with SD were far more sensitive than controls to thematically related competitors before identifying the targets. Moreover, most of the confusion errors made by patients with SD involved taxonomic distractors rather than thematic ones. We interpreted these findings as reflecting a semantic disequilibrium in SD, with increasing overreliance on thematic knowledge as taxonomic knowledge gradually deteriorates. We concluded that thematic relationships constitute a set of residual semantic knowledge and that their exaggerated activation in SD might certainly deserve further explorations to determine their specific role in this disease and notably, their influence on patients' abilities to deal with daily living activities. (PsycINFO Database Record (c) 2020 APA, all rights reserved).Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Non spécifiée
Établissement(s) :
Université de Lille
CNRS
CHU Lille
CNRS
CHU Lille
Équipe(s) de recherche :
Équipe Action, Vision et Apprentissage (AVA)
Date de dépôt :
2020-01-21T08:48:23Z
2020-01-21T11:38:45Z
2020-01-21T11:38:45Z
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- Eye-Tracking Thematic in SD Merck et al (2020) Neuropsychology.docx
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