Abstract：
:Symbolic visual cues indicating the location of an upcoming target are believed to invoke endogenous shifts of attention to cued locations. In the present study, we investigated how visual attention is shifted during such cuing paradigms by recording event-related potentials (ERPs). We focused on a component known to index lateralized shifts of perceptual attention during visual search tasks, known as the N2pc component. The ERP data show that attention was shifted to a cued location in anticipation of a target shape when the location is marked by a placeholder object (Experiments 1 and 2). However, when the possible locations were not marked by placeholder objects, we found no evidence for an anticipatory shift of attention to the cued location (Experiment 3). These findings indicate that the perceptual attention mechanism indexed by the N2pc is deployed to objects and not simply locations in space devoid of object structure.
journal_name
Brain Resjournal_title
Brain researchauthors
Woodman GF,Arita JT,Luck SJdoi
10.1016/j.brainres.2009.08.011subject
Has Abstractpub_date
2009-11-10 00:00:00pages
101-11eissn
0006-8993issn
1872-6240pii
S0006-8993(09)01637-0journal_volume
1297pub_type
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