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Title: Fixation-related potentials in visual search: a combined EEG and eye tracking study
Authors: Kamienkowski, J. E.
Ison, M. J.
Quiroga, R. Q.
Sigman, M.
First Published: 6-Jul-2012
Publisher: Association for Research in Vision and Ophthalmology (ARVO)
Citation: Journal of Vision, 2012, 12 (7), pp. 4-4
Abstract: We report a study of concurrent eye movements and electroencephalographic (EEG) recordings while subjects freely explored a search array looking for hidden targets. We describe a sequence of fixation-event related potentials (fERPs) that unfolds during ∼ 400 ms following each fixation. This sequence highly resembles the event-related responses in a replay experiment, in which subjects kept fixation while a sequence of images occurred around the fovea simulating the spatial and temporal patterns during the free viewing experiment. Similar responses were also observed in a second control experiment where the appearance of stimuli was controlled by the experimenters and presented at the center of the screen. We also observed a relatively early component (∼150 ms) that distinguished between targets and distractors only in the freeviewing condition. We present a novel approach to match the critical properties of two conditions (targets/distractors), which can be readily adapted to other paradigms to investigate EEG components during free eye-movements.
DOI Link: 10.1167/12.7.4
eISSN: 1534-7362
Status: Peer-reviewed
Type: Journal Article
Appears in Collections:Published Articles, Dept. of Engineering

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