WARNING: This is an old plugin I wrote in 2007 and never updated to reflect changes in EEGlab or MATLAB. PR's to fix this are welcome.
A plugin for the EEGlab Toolbox for MATLAB, implementing the regression-based algorithm for ocular correction of EEG-data proposed by Gratton et al. 1982.
@ARTICLE{Gratton1983,
author = {Gratton, Gabriele and Coles, Michael G. H. and Donchin, Emanuel},
title = {A new method for off-line removal of ocular artifact},
journal = {Electroencephalography and Clinical Neurophysiology},
year = {1983},
volume = {55},
pages = {468--484},
number = {4}
}
The algorithm estimates different regression parameters for blink-segments and non-blink-segments. Therefore, two parameters have to be specified to distinguish blink vs. non-blink data:
blinkcritwintime window for criterion (in ms)blinkcritvoltamplitude criterion for blink detection: (EOG(t) - EOG(t-win)) + (EOG(t) - EOG(t+win)) >= crit
Copy all m-files into a subdirectory under the 'plugins' path of your EEGlab-installation. Then restart EEGlab and a menu-item in the 'Tools' menu should appear. For more details about EEGlab-Plugins, refer to http://www.sccn.ucsd.edu/eeglab/.