Prioritizing new over old: an fMRI study of the preview search task

Human Brain Mapping
Christian N L OliversGlyn W Humphreys

Abstract

In visual search, observers can successfully ignore temporally separated distractors that are presented as a preview before onset of the search display. Previous behavioral studies have demonstrated the involvement of top-down selection mechanisms in preview search, biasing attention against the old set in favor of the more relevant new set. Using functional magnetic resonance imaging, we replicate and extend findings showing the involvement of superior and inferior parietal areas in the preview task when compared to both a relatively easy single-set search task and a more effortful full-set search task. In contrast, the effortful full-set search showed activation in the dorsolateral prefrontal cortex when compared to the single-set search, suggesting that this area is involved in rejecting additional distractors that could not be separated in time.

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Citations

Jul 14, 2010·Journal of Cognitive Neuroscience·Kevin DentGlyn W Humphreys
Sep 3, 2010·Journal of Cognitive Neuroscience·Helen E Payne, Harriet A Allen
Nov 19, 2011·Attention, Perception & Psychophysics·Kevin DentGlyn W Humphreys
Apr 16, 2010·Annals of the New York Academy of Sciences·M Jane RiddochGlyn W Humphreys
Apr 9, 2016·Attention, Perception & Psychophysics·Blaire DubeNaseem Al-Aidroos
Feb 21, 2014·Cerebral Cortex·Niklas IhssenKimron L Shapiro
May 23, 2013·Vision Research·M PersikeG Meinhardt
Feb 10, 2007·Vision Research·H A Allen, G W Humphreys
Sep 25, 2007·Vision Research·H A Allen, G W Humphreys
Jan 4, 2013·Human Brain Mapping·Julia SuchanDorothee Saur

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