Vision, Visual Attention, and Visual Search

2007 ◽  
pp. 91-129
Keyword(s):  
Visual Search ◽  
Visual Attention

scholarly journals Form, set organization and visual attention in illusory contours perception

Psihologija ◽  
2009 ◽  
Vol 42 (2) ◽  
pp. 239-254 ◽  
Author(s):  
Vasilije Gvozdenovic
Keyword(s):  
Visual Search ◽  
Visual Attention ◽  
Experimental Psychology ◽  
Illusory Contours ◽  
Target Figure ◽  
Simple Detection ◽  
The Way

Laboratory of Experimental Psychology, University of Belgrade The aim of the study was the investigation of form, spatial set organization and visual attention in visual search of illusory contours. Three visual search experiments were conducted. In the first experiment, where the simple detection procedure was used, subject's task was to detect square among vertical and horizontal lines. Other experiments investigated visual search of illusory contours in four different set organizations. Introduction of set organization was the way of manipulation of target's eccentricity among other elements. Analysis showed different type of search of the regular and the illusory square figure. The search profile of the regular square proved to be parallel, while all the searches of the illusory squares remained serial. Set organization had important role in visual search of illusory contours. Regardless of serial profile, visual search was faster in cases where target figure was more salient due to the background elements organization.

scholarly journals Visual attention in spatial cueing and visual search

2021 ◽  
Vol 21 (3) ◽  
pp. 1
Author(s):  
Jongsoo Baek ◽  
Barbara Anne Dosher ◽  
Zhong-Lin Lu
Keyword(s):  
Visual Search ◽  
Visual Attention ◽  
Spatial Cueing

scholarly journals Age-related changes in visual search: manipulation of colour cues based on cone contrast and opponent modulation space

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Shuto Tamura ◽  
Keiko Sato
Keyword(s):  
Visual Search ◽  
Visual Attention ◽  
Reaction Times ◽  
Visual Space ◽  
Preliminary Evidence ◽  
Human Lens ◽  
Search Performance ◽  
Older Individuals ◽  
Colour Perception ◽  
Age Related

AbstractReduced retinal illuminance affects colour perception in older adults, and studies show that they exhibit deficiencies in yellow-blue (YB) discrimination. However, the influence of colour cues on the visual attention in older individuals remains unclarified. Visual attention refers to the cognitive model by which we prioritise regions within the visual space and selectively process information. The present study aimed to explore the effect of colour on visual search performance in older observers. In our experiment, younger observers wearing glasses with a filter that simulated the spectral transmittance of the aging human lens and older observers performed two types of search tasks, feature search (FS) and conjunction search (CS), under three colour conditions: red-green, YB, and luminance. Targets and distractors were designed on the basis of the Derrington–Krauskopf–Lennie colour representation. In FS tasks, reaction times changed according to colour in all groups, especially under the YB condition, regardless of the presence or absence of distractors. In CS tasks with distractors, older participants and younger participants wearing glasses showed slower responses under chromatic conditions than under the achromatic condition. These results provide preliminary evidence that, for older observers, visual search performance may be affected by impairments in chromatic colour discrimination.

scholarly journals The eye movements of dyslexic children during reading and visual search: Impact of the visual attention span

2007 ◽  
Vol 47 (19) ◽  
pp. 2521-2530 ◽  
Author(s):  
Chloé Prado ◽  
Matthieu Dubois ◽  
Sylviane Valdois
Keyword(s):  
Visual Search ◽  
Eye Movements ◽  
Visual Attention ◽  
Attention Span

The degree of human visual attention in the visual search

2000 ◽  
Vol 4 (2) ◽  
pp. 57-61 ◽  
Author(s):  
Hiroaki Mizuhara ◽  
Jing-Long Wu ◽  
Yoshikazu Nishikawa
Keyword(s):  
Visual Search ◽  
Visual Attention ◽  
Human Visual Attention

Grapheme–Color Synesthesia Influences Overt Visual Attention

2009 ◽  
Vol 21 (2) ◽  
pp. 246-258 ◽  
Author(s):  
Jonathan S. A. Carriere ◽  
Daniel Eaton ◽  
Michael G. Reynolds ◽  
Mike J. Dixon ◽  
Daniel Smilek
Keyword(s):  
Visual Search ◽  
Eye Movements ◽  
Visual Attention ◽  
Eye Tracking ◽  
Search Task ◽  
Visual Search Task ◽  
Free Viewing ◽  
Colored Target

For individuals with grapheme–color synesthesia, achromatic letters and digits elicit vivid perceptual experiences of color. We report two experiments that evaluate whether synesthesia influences overt visual attention. In these experiments, two grapheme–color synesthetes viewed colored letters while their eye movements were monitored. Letters were presented in colors that were either congruent or incongruent with the synesthetes' colors. Eye tracking analysis showed that synesthetes exhibited a color congruity bias—a propensity to fixate congruently colored letters more often and for longer durations than incongruently colored letters—in a naturalistic free-viewing task. In a more structured visual search task, this congruity bias caused synesthetes to rapidly fixate and identify congruently colored target letters, but led to problems in identifying incongruently colored target letters. The results are discussed in terms of their implications for perception in synesthesia.

scholarly journals Allocation of resources in working memory: Theoretical and empirical implications for visual search

2021 ◽  
Author(s):  
Stanislas Huynh Cong ◽  
Dirk Kerzel
Keyword(s):  
Working Memory ◽  
Visual Search ◽  
Visual Attention ◽  
Target Recognition ◽  
Limited Resource ◽  
Allocation Of Resources ◽  
The Status ◽  
Resource Hypothesis ◽  
The Relationship ◽  
Empirical Implications

AbstractRecently, working memory (WM) has been conceptualized as a limited resource, distributed flexibly and strategically between an unlimited number of representations. In addition to improving the precision of representations in WM, the allocation of resources may also shape how these representations act as attentional templates to guide visual search. Here, we reviewed recent evidence in favor of this assumption and proposed three main principles that govern the relationship between WM resources and template-guided visual search. First, the allocation of resources to an attentional template has an effect on visual search, as it may improve the guidance of visual attention, facilitate target recognition, and/or protect the attentional template against interference. Second, the allocation of the largest amount of resources to a representation in WM is not sufficient to give this representation the status of attentional template and thus, the ability to guide visual search. Third, the representation obtaining the status of attentional template, whether at encoding or during maintenance, receives an amount of WM resources proportional to its relevance for visual search. Thus defined, the resource hypothesis of visual search constitutes a parsimonious and powerful framework, which provides new perspectives on previous debates and complements existing models of template-guided visual search.

Attention Switching vs Attention Sharing in Searching Dual RSVP Streams

Perception ◽  
1996 ◽  
Vol 25 (1_suppl) ◽  
pp. 122-122
Author(s):  
N Prins ◽  
J F Juola
Keyword(s):  
Resource Allocation ◽  
Visual Search ◽  
Visual Attention ◽  
The Other ◽  
Zoom Lens ◽  
Response Signal ◽  
Attention Switching ◽  
Attentional Allocation ◽  
Switching Model ◽  
Other Hand

Ideas about how visual attention is distributed over space include spotlight, zoom lens, and various resource allocation models. Spotlight and serial allocation models assume that attention is narrowly focused and switches from one object to another in visual search. Zoom lens and parallel allocation models, on the other hand, describe a flexible gradient within which attention can be shared among several items simultaneously. We report two experiments in which simultaneous rapid serial visual presentations (RSVPs) of two streams of digits were used, one above and one below a fixation point. In experiment 1, subjects were told to report the digit immediately following a uniquely coloured signal digit. In some trial blocks the coloured signal digit always appeared in either the top or bottom stream, and in other blocks the signal digit could occur in either stream. Stream location probabilities were varied between blocks in order to induce strategic variations in attentional allocation. In experiment 2, subjects were told to report the first two digits visible when the fixation point changed colour. Subjects were instructed to report one digit from the top stream and one from the bottom, with report order counterbalanced between blocks. The lag between the response signal and the actual digit reported was shown to vary strongly with signal location probability (experiment 1), and the lag between items reported from the top and bottom streams depended heavily on the order of report (experiment 2). The results were more consistent with an attention-switching model than with an attention-sharing model of visual attention.

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