scholarly journals Shifts of visuospatial attention do not cause the spatial distortions of the Roelofs effect

2013 ◽  
Vol 13 (12) ◽  
pp. 4-4 ◽  
Author(s):  
B. D. Lester ◽  
P. Dassonville
Keyword(s):  
Visuospatial Attention ◽  
Roelofs Effect

Focusing of Visuospatial Attention

2001 ◽  
Vol 15 (4) ◽  
pp. 256-274 ◽  
Author(s):  
Caterina Pesce ◽  
Rainer Bösel
Keyword(s):  
Reaction Times ◽  
Visual Space ◽  
Spatial Relation ◽  
Stimulus Onset ◽  
Visuospatial Attention ◽  
Task Demands ◽  
Time Interval ◽  
Behavioral Studies ◽  
Task Conditions ◽  
Simple Rt

Abstract In the present study we explored the focusing of visuospatial attention in subjects practicing and not practicing activities with high attentional demands. Similar to the studies of Castiello and Umiltà (e. g., 1990) , our experimental procedure was a variation of Posner's (1980) basic paradigm for exploring covert orienting of visuospatial attention. In a simple RT-task, a peripheral cue of varying size was presented unilaterally or bilaterally from a central fixation point and followed by a target at different stimulus-onset-asynchronies (SOAs). The target could occur validly inside the cue or invalidly outside the cue with varying spatial relation to its boundary. Event-related brain potentials (ERPs) and reaction times (RTs) were recorded to target stimuli under the different task conditions. RT and ERP findings showed converging aspects as well as dissociations. Electrophysiological results revealed an amplitude modulation of the ERPs in the early and late Nd time interval at both anterior and posterior scalp sites, which seems to be related to the effects of peripheral informative cues as well as to the attentional expertise. Results were: (1) shorter latency effects confirm the positive-going amplitude enhancement elicited by unilateral peripheral cues and strengthen the criticism against the neutrality of spatially nonpredictive peripheral cueing of all possible target locations which is often presumed in behavioral studies. (2) Longer latency effects show that subjects with attentional expertise modulate the distribution of the attentional resources in the visual space differently than nonexperienced subjects. Skilled practice may lead to minimizing attentional costs by automatizing the use of a span of attention that is adapted to the most frequent task demands and endogenously increases the allocation of resources to cope with less usual attending conditions.

Early visuospatial attention and processing and related neurodevelopmental outcome at 2 years in children born very preterm

2020 ◽  
Author(s):  
Victoria A. A. Beunders ◽  
Marijn J. Vermeulen ◽  
Jorine A. Roelants ◽  
Nienke Rietema ◽  
Renate M. C. Swarte ◽  
...  
Keyword(s):  
Neurodevelopmental Outcome ◽  
Visuospatial Attention ◽  
Very Preterm

On Why Objects Appear Smaller in the Visual Periphery

2019 ◽  
Vol 31 (1) ◽  
pp. 88-96 ◽  
Author(s):  
Wladimir Kirsch ◽  
Roland Pfister ◽  
Wilfried Kunde
Keyword(s):  
Visual Field ◽  
Visual System ◽  
Structural Properties ◽  
Spatial Attention ◽  
Visuospatial Attention ◽  
Peripheral Target ◽  
Perceptual Distortion ◽  
Visual Periphery ◽  
Peripheral Location ◽  
Exogenous Cue

An object appears smaller in the periphery than in the center of the visual field. In two experiments ( N = 24), we demonstrated that visuospatial attention contributes substantially to this perceptual distortion. Participants judged the size of central and peripheral target objects after a transient, exogenous cue directed their attention to either the central or the peripheral location. Peripheral target objects were judged to be smaller following a central cue, whereas this effect disappeared completely when the peripheral target was cued. This outcome suggests that objects appear smaller in the visual periphery not only because of the structural properties of the visual system but also because of a lack of spatial attention.

scholarly journals Zero gravity induced by parabolic flight enhances automatic capture and weakens voluntary maintenance of visuospatial attention

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Adriana Salatino ◽  
Claudio Iacono ◽  
Roberto Gammeri ◽  
Stefano T. Chiadò ◽  
Julien Lambert ◽  
...  
Keyword(s):  
Space Exploration ◽  
Parabolic Flight ◽  
Vestibular Function ◽  
Visuospatial Attention ◽  
Covert Attention ◽  
Zero Gravity ◽  
Deep Space ◽  
Otolith Organ ◽  
Deep Space Exploration ◽  
Automatic Capture

AbstractOrienting attention in the space around us is a fundamental prerequisite for willed actions. On Earth, at 1 g, orienting attention requires the integration of vestibular signals and vision, although the specific vestibular contribution to voluntary and automatic components of visuospatial attention remains largely unknown. Here, we show that unweighting of the otolith organ in zero gravity during parabolic flight, selectively enhances stimulus-driven capture of automatic visuospatial attention, while weakening voluntary maintenance of covert attention. These findings, besides advancing our comprehension of the basic influence of the vestibular function on voluntary and automatic components of visuospatial attention, may have operational implications for the identification of effective countermeasures to be applied in forthcoming human deep space exploration and habitation, and on Earth, for patients’ rehabilitation.

scholarly journals The induced Roelofs effect: two visual systems or the shift of a single reference frame?

2004 ◽  
Vol 44 (6) ◽  
pp. 603-611 ◽  
Author(s):  
Paul Dassonville ◽  
Bruce Bridgeman ◽  
Jagdeep Kaur Bala ◽  
Paul Thiem ◽  
Anthony Sampanes
Keyword(s):  
Reference Frame ◽  
Visual Systems ◽  
Roelofs Effect ◽  
Two Visual Systems
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