Abstract：
:In order to investigate the interplay between visuo-spatial attention and central attention, we varied the relative probability (25% vs. 75%) of the responses to lateralized targets in an attentional blink paradigm. When the first target was associated with a less probable response, we observed a larger attentional blink, that is, a general reduction in accuracy for the second target. The efficiency of deployment of spatial attention to the second target was also reduced as a function of the response frequency for the first target. Both the N2pc, an event-related potential (ERP) associated with the deployment of attention in visual space, and the SPCN (sustained posterior contralateral negativity), an ERP associated with the maintenance of information in visual short-term memory, time-locked to T2 were significantly reduced when the first target was associated with a less frequent response. Furthermore, the P3 ERP to T2 was abolished when the response to T1 was rare but not when it was frequent. The results show that the association of T1 to either a rare or frequent response causes significant interference with the deployment of visual spatial attention to T2, and with the short-term consolidation of T2 into visual short-term memory.
journal_name
Brain Resjournal_title
Brain researchauthors
Robitaille N,Jolicoeur P,Dell'Acqua R,Sessa Pdoi
10.1016/j.brainres.2007.09.004subject
Has Abstractpub_date
2007-12-14 00:00:00pages
158-69eissn
0006-8993issn
1872-6240pii
S0006-8993(07)02051-3journal_volume
1185pub_type
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