scholarly journals Effects of similarity, difficulty, and nontarget presentation on the time course of visual attention

1997 ◽  
Vol 59 (4) ◽  
pp. 593-600 ◽  
Author(s):  
Robert Ward ◽  
John Duncan ◽  
Kimron Shapiro
Keyword(s):  
Visual Attention ◽  
Time Course

scholarly journals Left-Hemispheric Asymmetry for Object-Based Attention: an ERP Study

2019 ◽  
Vol 9 (11) ◽  
pp. 315 ◽  
Author(s):  
Andrea Orlandi ◽  
Alice Mado Proverbio
Keyword(s):  
Visual Attention ◽  
Hemispheric Asymmetry ◽  
Time Course ◽  
Electrophysiological Study ◽  
Target Selection ◽  
Neural Correlates ◽  
Specific Stimulus ◽  
Object Categories ◽  
Object Based ◽  
Stimulus Features

It has been shown that selective attention enhances the activity in visual regions associated with stimulus processing. The left hemisphere seems to have a prominent role when non-spatial attention is directed towards specific stimulus features (e.g., color, spatial frequency). The present electrophysiological study investigated the time course and neural correlates of object-based attention, under the assumption of left-hemispheric asymmetry. Twenty-nine right-handed participants were presented with 3D graphic images representing the shapes of different object categories (wooden dummies, chairs, structures of cubes) which lacked detail. They were instructed to press a button in response to a target stimulus indicated at the beginning of each run. The perception of non-target stimuli elicited a larger anterior N2 component, which was likely associated with motor inhibition. Conversely, target selection resulted in an enhanced selection negativity (SN) response lateralized over the left occipito-temporal regions, followed by a larger centro-parietal P300 response. These potentials were interpreted as indexing attentional selection and categorization processes, respectively. The standardized weighted low-resolution electromagnetic tomography (swLORETA) source reconstruction showed the engagement of a fronto-temporo-limbic network underlying object-based visual attention. Overall, the SN scalp distribution and relative neural generators hinted at a left-hemispheric advantage for non-spatial object-based visual attention.

Young skilled deaf readers have an enhanced perceptual span in reading

2018 ◽  
Vol 71 (1) ◽  
pp. 291-301 ◽  
Author(s):  
Nathalie N Bélanger ◽  
Michelle Lee ◽  
Elizabeth R Schotter
Keyword(s):  
Visual Attention ◽  
Attentional Control ◽  
Time Course ◽  
Visual Stimuli ◽  
Reading Level ◽  
Deaf Children ◽  
Moving Window ◽  
Perceptual Span ◽  
Deaf Readers ◽  
Deaf Adults

Recently, Bélanger, Slattery, Mayberry and Rayner showed, using the moving-window paradigm, that profoundly deaf adults have a wider perceptual span during reading relative to hearing adults matched on reading level. This difference might be related to the fact that deaf adults allocate more visual attention to simple stimuli in the parafovea. Importantly, this reorganization of visual attention in deaf individuals is already manifesting in deaf children. This leads to questions about the time course of the emergence of an enhanced perceptual span (which is under attentional control) in young deaf readers. The present research addressed this question by comparing the perceptual spans of young deaf readers (age 7-15) and young hearing readers (age 7-15). Young deaf readers, like deaf adults, were found to have a wider perceptual span relative to their hearing peers matched on reading level, suggesting that strong and early reorganization of visual attention in deaf individuals goes beyond the processing of simple visual stimuli and emerges into more cognitively complex tasks, such as reading.

Salience-based progression of visual attention: Time course

2016 ◽  
Vol 61 (3) ◽  
pp. 163-175 ◽  
Author(s):  
C. Couffe ◽  
R. Mizzi ◽  
G.A. Michael
Keyword(s):  
Visual Attention ◽  
Time Course

VISUAL ATTENTION: Control, Representation, and Time Course

1997 ◽  
Vol 48 (1) ◽  
pp. 269-297 ◽  
Author(s):  
Howard E. Egeth ◽  
Steven Yantis
Keyword(s):  
Visual Attention ◽  
Time Course ◽  
Attention Control

The time course of working memory effects on visual attention

2010 ◽  
Vol 18 (8) ◽  
pp. 1089-1112 ◽  
Author(s):  
Isabel Dombrowe ◽  
Christian N. L. Olivers ◽  
Mieke Donk
Keyword(s):  
Working Memory ◽  
Visual Attention ◽  
Time Course ◽  
Memory Effects
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