منابع مشابه
Attention demands of visual search.
The relation between attention demand and the number of items in the array (array size) was investigated by engaging subjects in a primary search task and measuring spare capacity at different points in time, with a secondary tone task that occurred randomly on half of the trials. The major variables in both tasks were array size (4, 8, or 12 letters) and stimulus onset asynchrony (SOA: -400, -...
متن کاملVisual search and selective attention
Visual search is a key paradigm in attention research that has proved to be a test bed for competing theories of selective attention. The starting point for most current theories of visual search has been Treisman’s ‘‘feature integration theory’’ of visual attention (e.g., Treisman & Gelade, 1980). A number of key issues that have been raised in attempts to test this theory are still pertinent ...
متن کاملFocal attention in visual search
Visual search operates in different modes assumed to reflect serial and parallel processing. The basis of this distinction is not yet clear. It is often assumed that serial search involves sequential shifts of focal attention across a scene and that no such shifts occur in parallel search. Direct measurements of attention effects during search show that the focus of attention moves to the targe...
متن کاملSerial deployment of attention during visual search.
This study examined whether objects are attended in serial or in parallel during a demanding visual search task. A component of the event-related potential waveform, the N2pc wave, was used as a continuous measure of the allocation of attention to possible targets in the search arrays. Experiment 1 demonstrated that the relative allocation of attention shifts rapidly, favoring one item and then...
متن کاملIntegrating Three Mechanisms of Visual Attention for Active Visual Search
Algorithms for robotic visual search can benefit from the use of visual attention methods in order to reduce computational costs. Here, we describe how three distinct mechanisms of visual attention can be integrated and productively used to improve search performance. The first is viewpoint selection as has been proposed earlier using a greedy search over a probabilistic occupancy grid represen...
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ژورنال
عنوان ژورنال: Memory & Cognition
سال: 1978
ISSN: 0090-502X,1532-5946
DOI: 10.3758/bf03197478