RT Journal Article
T1 Feature processing during visual search in normal aging: Electrophysiological evidence
A1 Lorenzo López, Laura
A1 Amenedo Losada, María Elena
A1 Cadaveira Mahía, Fernando
K1 Event-related potentials (ERPs)
K1 N2pc
K1 Visual search
K1 Pop-out
K1 Attentional capture
AB Event-related potentials (ERPs) were recorded from healthy young and older subjects during the execution of a visual search task in which they were required to detect the presence of a target stimulus that differed from distractors in a salient feature (orientation). Apart from the orientation target, a task-irrelevant singleton defined by a different feature (color) was also presented without instruction. The effects of normal aging on the N2pc component, an electrophysiological correlate of the allocation of visuospatial attention, were evaluated for the first time. Behavioral results showed an increase in the mean reaction time (RT) and a reduction in the hit rates with age. Electrophysiological results showed a consistent N2pc for orientation target pop-outs but not for irrelevant color pop outs in both age groups, suggesting that the irrelevant color singleton did not induce attentional capture. Furthermore, the N2pc component observed for orientation targets was significantly delayed and attenuated in older subjects compared to young subjects, suggesting a specific impairment of the allocation of visuospatial attention with advancing age.
PB Elsevier
SN 0197-4580
YR 2008
FD 2008
LK http://hdl.handle.net/10347/23228
UL http://hdl.handle.net/10347/23228
LA eng
NO Lorenzo-López, L.; Amenedo, E.; Cadaveira, F. (2008). Feature processing during visual search in normal aging: electrophysiological evidence. Neurobiology of Aging, 29, 1101-1110. doi: 10.1016/j.neurobiolaging.2007.02.007
NO This study was supported by grants from the Spanish MEC (SEJ2004-01377) and Xunta de Galicia (PGIDT05PXIC21101PN)
DS Minerva
RD 27 abr 2026