Two varieties of search negativities recorded in visual search tasks
نویسندگان
چکیده
منابع مشابه
Visual search and dual tasks reveal two distinct attentional resources.
Most theories of visual processing assume that a target will "pop out" from an array of distractors ("parallel" visual search, e.g., color or orientation discrimination) if targets and distractors can be discriminated without attention. When the discrimination requires attention (e.g., rotated L vs. T or red-green vs. green-red bisected disks), "serial" examination is needed in visual search. A...
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One of the most frustrating things about studying attention is that research is so often is accompanied by vague discussions of capacity limits, bottlenecks, resource limits, allocations of attentional resources, and the like. How can these notions be made more concrete? The sub-area of computer science known as Computational Complexity is concerned with the theoretical issues dealing with the ...
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11 In most visual search experiments in the laboratory, objects are presented on an isolated, blank background. In most real world 12 search tasks, however, the background is continuous and can be complex. In six experiments, we examine the ability of the visual 13 system to separate search items from a background. The results support a view in which objects are separated from backgrounds in a ...
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In visual search tasks, targets are detected more rapidly when they appear in locations that commonly contain a target than when they appear in locations that rarely contain a target. Five experiments were conducted to investigate two specific properties of this location probability effect: its dependence on spatial location versus relative position and its dependence on or independence of targ...
متن کاملThe role of attention in different visual-search tasks.
Observers viewed displays containing a variable number of distractors of one color and a target of another color. In some experiments, the target and distractors maintained their color from trial to trial; in others, they reversed unpredictably. Observers made a speeded two-choice judgment concerning either the presence, the color, or the shape of the odd-colored target. With only one exception...
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ژورنال
عنوان ژورنال: Japanese Journal of Physiological Psychology and Psychophysiology
سال: 1992
ISSN: 0289-2405
DOI: 10.5674/jjppp1983.10.23