Qualitative differences in the guidance of attention during single-color and multiple-color visual search: Behavioral and electrophysiological evidence.

2013 ◽  
Vol 39 (5) ◽  
pp. 1433-1442 ◽  
Author(s):  
Anna Grubert ◽  
Martin Eimer
Keyword(s):  
Visual Search ◽  
Electrophysiological Evidence

Parallel and serial visual search after closed head injury: Electrophysiological evidence for perceptual dysfunctions

1992 ◽  
Vol 30 (6) ◽  
pp. 495-514 ◽  
Author(s):  
Hans-Jochen Heinze ◽  
Thomas Frank Münte ◽  
Wolfgang Gobiet ◽  
Hendrik Niemann ◽  
Ronald M. Ruff
Keyword(s):  
Visual Search ◽  
Head Injury ◽  
Closed Head Injury ◽  
Electrophysiological Evidence ◽  
Closed Head

scholarly journals Electrophysiological Evidence of Semantic Interference in Visual Search

2010 ◽  
Vol 22 (10) ◽  
pp. 2212-2225 ◽  
Author(s):  
Anna L. Telling ◽  
Sanjay Kumar ◽  
Antje S. Meyer ◽  
Glyn W. Humphreys
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Search Display ◽  
Evoked Responses ◽  
Semantic Interference ◽  
Visual Evoked Responses ◽  
Early Stages ◽  
Electrophysiological Evidence ◽  
Object Display ◽  
Visual Evoked

Visual evoked responses were monitored while participants searched for a target (e.g., bird) in a four-object display that could include a semantically related distractor (e.g., fish). The occurrence of both the target and the semantically related distractor modulated the N2pc response to the search display: The N2pc amplitude was more pronounced when the target and the distractor appeared in the same visual field, and it was less pronounced when the target and the distractor were in opposite fields, relative to when the distractor was absent. Earlier components (P1, N1) did not show any differences in activity across the different distractor conditions. The data suggest that semantic distractors influence early stages of selecting stimuli in multielement displays.

scholarly journals Feature processing during visual search in normal aging: Electrophysiological evidence

2008 ◽  
Vol 29 (7) ◽  
pp. 1101-1110 ◽  
Author(s):  
Laura Lorenzo-López ◽  
Elena Amenedo ◽  
Fernando Cadaveira
Keyword(s):  
Visual Search ◽  
Normal Aging ◽  
Electrophysiological Evidence ◽  
Feature Processing

scholarly journals Electrophysiological Evidence of the Capture of Visual Attention

2006 ◽  
Vol 18 (4) ◽  
pp. 604-613 ◽  
Author(s):  
Clayton Hickey ◽  
John J. McDonald ◽  
Jan Theeuwes
Keyword(s):  
Visual Search ◽  
Visual Attention ◽  
Search Strategies ◽  
Event Related Potential ◽  
Search Array ◽  
Vertical Meridian ◽  
Electrophysiological Evidence ◽  
Integral Role ◽  
Task Irrelevant ◽  
Rule Out

We investigated the ability of salient yet task-irrelevant stimuli to capture attention in two visual search experiments. Participants were presented with circular search arrays that contained a highly salient distractor singleton defined by color and a less salient target singleton defined by form. A component of the event-related potential called the N2pc was used to track the allocation of attention to lateralized positions in the arrays. In Experiment 1, a lateralized distractor elicited an N2pc when a concurrent target was presented on the vertical meridian and thus could not elicit lateralized components such as the N2pc. A similar distractor-elicited N2pc was found in Experiment 2, which was conducted to rule out certain voluntary search strategies. Additionally, in Experiment 2 both the distractor and the target elicited the N2pc component when the two stimuli were presented on opposite sides of the search array. Critically, the distractor-elicited N2pc preceded the target-elicited N2pc on these trials. These results demonstrate that participants shifted attention to the target only after shifting attention to the more salient but task-irrelevant distractor. This pattern of results is in line with theories of attention in which stimulus-driven control plays an integral role.

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