scholarly journals Neural correlates of context-dependent feature conjunction learning in visual search tasks

2016 ◽  
Vol 37 (6) ◽  
pp. 2319-2330 ◽  
Author(s):  
Eric A. Reavis ◽  
Sebastian M. Frank ◽  
Mark W. Greenlee ◽  
Peter U. Tse
Keyword(s):  
Visual Search ◽  
Neural Correlates ◽  
Search Tasks ◽  
Feature Conjunction ◽  
Context Dependent

Attention-Related Modulation of Sensory-Evoked Brain Activity in a Visual Search Task

1993 ◽  
Vol 5 (2) ◽  
pp. 188-195 ◽  
Author(s):  
Steven J. Luck ◽  
Silu Fan ◽  
Steven A. Hillyard
Keyword(s):  
Visual Search ◽  
Target Item ◽  
Brain Activity ◽  
Visual Space ◽  
Distractor Item ◽  
Search Tasks ◽  
Visual Spatial ◽  
Latency Range ◽  
Feature Conjunction ◽  
Sensory Evoked

When subjects are explicitly cued to focus attention on a particular location in visual space, targets presented at that location have been shown to elicit enhanced sensory-evoked activity in recordings of event-related brain potentials (ERPs). The present study sought to determine if this type of sensory facilitation also occurs during visual search tasks in which a feature conjunction target must be identified, presumably by means of focal attention, within an array of distractor items. In this experiment, subjects were required to discriminate the shape of a distinctively colored target item within an array containing 15 distractor items, and ERPs were elicited by task-irrelevant probe stimuli that were presented at the location of the target item or at the location of a distractor item on the opposite side of the array. When the delay between search-array onset and probe onset was 250 msec, the sensory-evoked responses in the latency range 75-200 msec were larger for probes presented at the location of the target than for probes presented at the location of the irrelevant distractor. These results indicate that sensory processing is modulated in a spatially restricted manner during visual search, and that focusing attention on a feature conjunction target engages neural systems that are shared with other forms of visual-spatial attention.

In Search of Experience Effects: How TSA Officers Differ From Undergraduates on Visual Search Tasks

2012 ◽  
Author(s):  
Stephen R. Mitroff ◽  
Adam T. Biggs ◽  
Matthew S. Cain ◽  
Elise F. Darling ◽  
Kait Clark ◽  
...  
Keyword(s):  
Visual Search ◽  
Search Tasks ◽  
Experience Effects

Differences in visual search tasks between congenitally deaf and normally hearing adults

1998 ◽  
Vol 6 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Philippe Stivalet ◽  
Yvan Moreno ◽  
Joëlle Richard ◽  
Pierre-Alain Barraud ◽  
Christian Raphel
Keyword(s):  
Visual Search ◽  
Search Tasks

Curvature is a Basic Feature for Visual Search Tasks

Perception ◽  
1992 ◽  
Vol 21 (4) ◽  
pp. 465-480 ◽  
Author(s):  
Jeremy M Wolfe ◽  
Alice Yee ◽  
Stacia R Friedman-Hill
Keyword(s):  
Visual Search ◽  
Basic Feature ◽  
Search Tasks

scholarly journals Reading problems and their connection with visual search and attention: The search for a cause continues

2021 ◽  
Author(s):  
Heida Maria Sigurdardottir ◽  
Hilma Ros Omarsdóttir ◽  
Anna Sigridur Valgeirsdottir
Keyword(s):  
Visual Search ◽  
Internal Control ◽  
Search Task ◽  
Conjunction Search ◽  
Reading Problems ◽  
Visual Stream ◽  
Attentional Processes ◽  
Search Tasks ◽  
Reading Abilities ◽  
Gating Mechanism

Attention has been hypothesized to act as a sequential gating mechanism for the orderly processing of letters in words. These same visuo-attentional processes are assumed to partake in some but not all visual search tasks. In the current study, 60 adults with varying degrees of reading abilities, ranging from expert readers to severely impaired dyslexic readers, completed an attentionally demanding visual conjunction search task thought to heavily rely on the dorsal visual stream. A visual feature search task served as an internal control. According to the dorsal view of dyslexia, reading problems should go hand in hand with specific problems in visual conjunction search – particularly elevated conjunction search slopes (time per search item) – which would be interpreted as a problem with visual attention. Results showed that reading problems were associated with slower visual search, especially conjunction search. However, problems with reading were not associated with increased conjunction search slopes but instead with increased conjunction search intercepts, traditionally not interpreted as reflecting attentional processes. Our data are hard to reconcile with hypothesized problems in dyslexia with the serial moving of an attentional spotlight across a visual scene or a page of text.

scholarly journals Stable individual differences in strategies within, but not between, visual search tasks

2018 ◽  
Author(s):  
Alasdair D F Clarke ◽  
Jessica Irons ◽  
Warren James ◽  
Andrew B. Leber ◽  
Amelia R. Hunt
Keyword(s):  
Individual Differences ◽  
Visual Search ◽  
Search Task ◽  
The Other ◽  
Search Performance ◽  
Search Tasks ◽  
And Performance ◽  
Context Specific ◽  
Test Retest Reliability ◽  
Over Time

A striking range of individual differences has recently been reported in three different visual search tasks. These differences in performance can be attributed to strategy, that is, the efficiency with which participants control their search to complete the task quickly and accurately. Here we ask if an individual's strategy and performance in one search task is correlated with how they perform in the other two. We tested 64 observers in the three tasks mentioned above over two sessions. Even though the test-retest reliability of the tasks is high, an observer's performance and strategy in one task did not reliably predict their behaviour in the other two. These results suggest search strategies are stable over time, but context-specific. To understand visual search we therefore need to account not only for differences between individuals, but also how individuals interact with the search task and context. These context-specific but stable individual differences in strategy can account for a substantial proportion of variability in search performance.

scholarly journals Neural correlates of central versus peripheral target detection during complex visual search

2011 ◽  
Vol 11 (11) ◽  
pp. 1294-1294
Author(s):  
S. Utz ◽  
G. W. Humphreys ◽  
J. P. McCleery
Keyword(s):  
Visual Search ◽  
Target Detection ◽  
Neural Correlates ◽  
Peripheral Target

scholarly journals Visual working memory representations are shifted toward irrelevant features of distractors in intervening visual search tasks

2019 ◽  
Vol 19 (10) ◽  
pp. 311b
Author(s):  
Zachary A Lively ◽  
Gavin JP Ng ◽  
Simona Buetti ◽  
Alejandro Lleras
Keyword(s):  
Working Memory ◽  
Visual Search ◽  
Visual Working Memory ◽  
Search Tasks ◽  
Memory Representations
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