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Disentangling gaze shifts from preparatory ERP effects during spatial attention.

Kennett, S; van Velzen, J; Eimer, M; Driver, J; (2007) Disentangling gaze shifts from preparatory ERP effects during spatial attention. Psychophysiology , 44 (1) 69 - 78. 10.1111/j.1469-8986.2006.00470.x. Gold open access

Abstract

After a cue directing attention to one side, anterior event-related potentials (ERPs) show contralateral negativity (anterior directing attention negativity, ADAN). It is unclear whether ADAN effects are contaminated by contralateral negativity arising from residual gaze shifts. Conversely, it is possible that ADAN-related potentials contaminate the horizontal electrooculogram (HEOG), via volume conduction. To evaluate these possibilities, we used high-resolution infrared eye tracking while recording EEG and HEOG in a cued spatial-attention task. We found that, after conventional ERP and HEOG preprocessing exclusions, small but systematic residual gaze shifts in the cued direction can remain, as revealed by the infrared measure. Nevertheless, by using this measure for more stringent exclusion of small gaze shifts, we confirmed that reliable ADAN components remain for preparatory spatial attention in the absence of any systematic gaze shifts toward the cued side.

Type:Article
Title:Disentangling gaze shifts from preparatory ERP effects during spatial attention.
Location:United States
Open access status:An open access publication
DOI:10.1111/j.1469-8986.2006.00470.x
Language:English
Additional information:PMCID: PMC1805658
Keywords:Adult, Attention, Cues, Electroencephalography, Evoked Potentials, Visual, Eye Movements, Female, Fixation, Ocular, Functional Laterality, Humans, Male, Photic Stimulation, Space Perception
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Psychology and Language Sciences (Division of) > Institute of Cognitive Neuroscience
UCL > School of Life and Medical Sciences > Faculty of Life Sciences

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