Hemispheric preponderance in categorical and coordinate visual processes.

Détails

ID Serval
serval:BIB_6D6896078B11
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Hemispheric preponderance in categorical and coordinate visual processes.
Périodique
Neuropsychologia
Auteur(s)
Parrot M., Doyon B., Démonet J.F., Cardebat D.
ISSN
0028-3932 (Print)
ISSN-L
0028-3932
Statut éditorial
Publié
Date de publication
1999
Peer-reviewed
Oui
Volume
37
Numéro
11
Pages
1215-1225
Langue
anglais
Notes
Publication types: Journal ArticlePublication Status: ppublish
Résumé
Two experiments were conducted to address whether a left hemispheric bias would be observed for categorical processing in both 'what' and 'where' systems (experiment 1) while a reverse bias would characterize coordinate processing whatever the systems (experiment 2). Young normal subjects were tested using divided visual field tasks. The results of experiment 1 indicated that subjects made categorical judgments in both what and where systems faster when stimuli are presented to the left hemisphere. The results of experiment 2 showed a significant interaction between visual field and difficulty of processing coordinate relationships. Indeed, a left-hemisphere advantage was observed when the task required easy processing whereas a right-hemisphere advantage was noted for difficult distinctions either in location (where system) or in lightness (what system). The left-hemisphere advantage we observed for categorization in both systems confirms the Kosslyn's hypothesis (1989) for the where system and suggests that the same left-hemisphere advantage also exists for the what system. Concerning coordinate processing, our findings highlight the influence of processing difficulty on the hemispheric lateralization and evidence a right hemispheric advantage for difficult coordinate processing and a left hemispheric advantage for easy coordinate processing. The results are discussed in terms of possible link between on the one hand difficulty and coordinate processing, and easiness and categorization on the other hand.
Mots-clé
Adult, Analysis of Variance, Cerebral Cortex/physiology, Concept Formation/physiology, Dominance, Cerebral/physiology, Female, Form Perception/physiology, Humans, Male, Space Perception/physiology, Visual Fields/physiology
Pubmed
Web of science
Création de la notice
24/03/2013 18:21
Dernière modification de la notice
20/08/2019 15:27
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