Co-registration of EEG and eye movements: effects of context on stimulus processing

Gaspar, C., Pernet, C., Rousselet, G. and Sereno, S. (2011) Co-registration of EEG and eye movements: effects of context on stimulus processing. In: 34th European Conference on Visual Perception, Toulouse, France, 28 Aug - 1 Sept 2011,

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Publisher's URL: http://www.ecvp2011.org/index.php?url=posters_abstracts.htm#ABST613

Abstract

The processing of a stimulus in isolation versus within a context was investigated while EEG and eye movements were simultaneously recorded. Specifically, 356 words and 356 nonwords were presented to 8 participants in both a word/nonword task and in sentences for reading over two experimental sessions. EEG (128 BIOSEMI) and eye movement (SR EyeLink 1000) signals were co-registered. Methods for removing eye movement artefacts from the EEG typically require extrapolation from a separate calibration data source to the experimental data. With co-registration, however, artefact detection and rejection is enhanced by matching the independent components of the experimental EEG data to the actual eye movement record. After signal pre-processing, data were analyzed using a single-trial general linear model [Pernet, Chauveau, Gaspar, and Rousselet, 2011, Computational Intelligence and Neuroscience, Article ID 831409, 11 pages, doi:10.1155/2011/831409]. The model included several regressors related to word variables (e.g., length, frequency of occurrence, imageability, number of syllables), task variables (e.g., task, session), and concurrent eye movement behavior (e.g., fixation position and duration, saccade length). The temporal dynamics of information sensitivity and its specificity to task demands is discussed.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sereno, Dr Sara and Gaspar, Dr Carl and Pernet, Dr Cyril
Authors: Gaspar, C., Pernet, C., Rousselet, G., and Sereno, S.
College/School:College of Science and Engineering > School of Psychology
College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology

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