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Object-based selection modulates top-down attentional shifts
- Source :
- Frontiers in Human Neuroscience, Vol 8 (2014), Frontiers in Human Neuroscience
- Publication Year :
- 2014
- Publisher :
- Frontiers Media S.A., 2014.
-
Abstract
- A large body of evidence supports that visual attention – the cognitive process of selectively concentrating on a salient or task-relevant subset of visual information – often works on object-based representation. Recent studies have postulated two possible accounts for the object-specific attentional advantage: attentional spreading and attentional prioritization, each of which modulates a bottom-up signal for sensory processing and a top-down signal for attentional allocation, respectively. It is still unclear which account can explain the object-specific attentional advantage. To address this issue, we examined the influence of object-specific advantage on two types of visual search: parallel search, invoked when a bottom-up signal is fully available at a target location, and serial search, invoked when a bottom-up signal is not enough to guide target selection and a top-down control for shifting of focused attention is required. Our results revealed that the object-specific advantage is given to the serial search but not to the parallel search, suggesting that object-based attention facilitates stimulus processing by affecting the priority of attentional shifts rather than by enhancing sensory signals. Thus, our findings support the notion that the object-specific attentional advantage can be explained by attentional prioritization but not attentional spreading.
- Subjects :
- Sensory system
Stimulus (physiology)
lcsh:RC321-571
Behavioral Neuroscience
attentional spreading
Salience (neuroscience)
Psychophysics
Original Research Article
lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry
Biological Psychiatry
Object-based attention
object-specific advantage
Visual search
parallel and serial search
attentional prioritization
visual search
Cognition
Top-down and bottom-up design
object-based attention
Psychiatry and Mental health
Neuropsychology and Physiological Psychology
Neurology
visual attention
Psychology
Cognitive psychology
Neuroscience
Subjects
Details
- Language :
- English
- ISSN :
- 16625161
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Frontiers in Human Neuroscience
- Accession number :
- edsair.doi.dedup.....97f6b2db9245424d89212fb5f619f0ad