Influence of Near Threshold Visual Distractors ...
Type de document :
Article dans une revue scientifique
DOI :
URL permanente :
Titre :
Influence of Near Threshold Visual Distractors on Perceptual Detection and Reaching Movements
Auteur(s) :
Deplancke, A. [Auteur]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Madelain, Laurent [Auteur]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Chauvin, A. [Auteur]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Cardoso-Leite, P. [Auteur]
Laboratoire Psychologie de la Perception [LPP - UMR 8242]
Gorea, A. [Auteur]
Laboratoire Psychologie de la Perception [LPP - UMR 8242]
Coello, Yann [Auteur]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Madelain, Laurent [Auteur]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Chauvin, A. [Auteur]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Cardoso-Leite, P. [Auteur]
Laboratoire Psychologie de la Perception [LPP - UMR 8242]
Gorea, A. [Auteur]
Laboratoire Psychologie de la Perception [LPP - UMR 8242]
Coello, Yann [Auteur]
Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Titre de la revue :
Journal of Neurophysiology
Nom court de la revue :
Journal of Neurophysiology
Numéro :
104
Pagination :
2249-2256
Éditeur :
American Physiological Society
Date de publication :
2010-10
Discipline(s) HAL :
Sciences cognitives
Résumé en anglais : [en]
Providing evidence against a dissociation between conscious vision for perception and unconscious vision for action, recent studies have suggested that perceptual and motor decisions are based on a unique signal but distinct ...
Lire la suite >Providing evidence against a dissociation between conscious vision for perception and unconscious vision for action, recent studies have suggested that perceptual and motor decisions are based on a unique signal but distinct decisional thresholds. The aim of the present study was to provide a direct test of this assumption in a perceptual-motor dual task involving arm movements. In 300 trials, 10 participants performed speeded pointing movements toward a highly visible target located at 10° from the fixation point and ±45° from the body midline. The target was preceded by one or two close to threshold distractor(s) (80 ms stimulus onset asynchrony) presented ±30° according to the target location. After each pointing movement, participants judged whether the distractor was present or not on either side of the target. Results showed a robust reaction time facilitation effect and a deviation toward the distractor when the distractor was both present and consciously perceived (Hit). A small reaction time facilitation was also observed when two distractors were physically present but undetected (double-miss)—this facilitation being highly correlated with the physical contrast of the distractors. These results are compatible with the theory proposing that perceptual and motor decisions are based on a common signal but emerge from a contrast dependent fixed threshold for motor responses and a variable context dependent criterion for perceptual responses. This paper thus extends to arm movement control previous findings related to oculomotor control.Lire moins >
Lire la suite >Providing evidence against a dissociation between conscious vision for perception and unconscious vision for action, recent studies have suggested that perceptual and motor decisions are based on a unique signal but distinct decisional thresholds. The aim of the present study was to provide a direct test of this assumption in a perceptual-motor dual task involving arm movements. In 300 trials, 10 participants performed speeded pointing movements toward a highly visible target located at 10° from the fixation point and ±45° from the body midline. The target was preceded by one or two close to threshold distractor(s) (80 ms stimulus onset asynchrony) presented ±30° according to the target location. After each pointing movement, participants judged whether the distractor was present or not on either side of the target. Results showed a robust reaction time facilitation effect and a deviation toward the distractor when the distractor was both present and consciously perceived (Hit). A small reaction time facilitation was also observed when two distractors were physically present but undetected (double-miss)—this facilitation being highly correlated with the physical contrast of the distractors. These results are compatible with the theory proposing that perceptual and motor decisions are based on a common signal but emerge from a contrast dependent fixed threshold for motor responses and a variable context dependent criterion for perceptual responses. This paper thus extends to arm movement control previous findings related to oculomotor control.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Non spécifiée
Établissement(s) :
Université de Lille
CNRS
CHU Lille
CNRS
CHU Lille
Date de dépôt :
2021-06-24T19:39:51Z
2021-06-28T08:31:22Z
2021-06-28T08:31:22Z