The Spatial Scale of Attention Strongly Modulates Saccade Latencies

Harwood, Mark R.; Madelain, Laurent; Krauzlis, Richard J.; Wallman, Josh

Type de document :

Article dans une revue scientifique

DOI :

10.1152/jn.00589.2007

PMID :

18234988

URL permanente :

http://hdl.handle.net/20.500.12210/40376

Titre :

The Spatial Scale of Attention Strongly Modulates Saccade Latencies

Auteur(s) :

Harwood, Mark R. [Auteur]
City College of New York [CUNY] [CCNY]
Madelain, Laurent [Auteur]

Unité de Recherche en Sciences Cognitives et Affectives [URECA]
Krauzlis, Richard J. [Auteur]
Wallman, Josh [Auteur]

Titre de la revue :

Journal of Neurophysiology

Nom court de la revue :

Journal of Neurophysiology

Numéro :

Pagination :

1743-1757

Éditeur :

American Physiological Society

Date de publication :

2008-04

Discipline(s) HAL :

Sciences cognitives

Résumé en anglais : [en]

We have previously shown that when a stimulus consisting of two concentric rings moves, saccade latencies are much longer (by 150 ms) when attention is directed to the larger ring than to the smaller ring. Here, we ...
Lire la suite >We have previously shown that when a stimulus consisting of two concentric rings moves, saccade latencies are much longer (by 150 ms) when attention is directed to the larger ring than to the smaller ring. Here, we investigated whether this effect can be explained by a deferral of the “cost” of making a saccade while the target remains inside the attentional field, or by purely visual factors (eccentricity or contrast). We found 1) latencies were shorter when attention was directed to small features irrespective of retinal eccentricity; 2) saccade latency distributions were systematically determined by the ratio between the amplitude of the stimulus step and the diameter of the attended ring: stimulus steps that were larger than the attended ring resulted in short latencies, whereas steps smaller than the attended ring resulted in proportionally longer and more variable latencies; 3) this effect was not seen in manual reaction times to the same target movement; and 4) suprathreshold changes in the contrast of targets, mimicking possible attentional effects on perceived contrast and saliency, had little effect on latency. We argue that the spatial scale of attention determines the urgency of saccade motor preparation processes by changing the rate and rate variability of the underlying decision signal, to defer the cost of saccades that result in little visual benefit.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Établissement(s) :

Université de Lille
CNRS
CHU Lille

Collections :

Autres travaux scientifiques

Date de dépôt :

2021-06-24T19:43:03Z
2021-06-25T09:48:41Z
2021-09-07T09:14:36Z

Historique des modifications

Numéro de version	Lien	Date de modification
3	20.500.12210/40376*	2021-09-07T09:14:06Z
2	20.500.12210/40376.2	2021-06-25T09:40:39Z
1	20.500.12210/40376.1	2021-06-24T19:43:03Z

*Version sélectionnée

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