= Tutorial XX: Synchronization with Eyetracker data = ''Authors: Francois Tadel, Martin Völker'' This tutorial introduces how to synchronize ocular data recorded with an '''EyeLink '''eye tracker (''SR Research, Canada'') with EEG / MEG raw data. <> == Introduction == Eye tracking is useful to detect blinks, saccades, microsaccades and fixations during an experiment. Typically, the eye tracker software will itself mark the most common artifact types like blinks and saccades. These artifact markers are of course useful for the analysis of EEG / MEG data, since we can then exclude specific periods, which are contominated with artifacts. To do so, we need to synchronize the eye tracker data with our EEG / MEG recordings. This tutorial focusses on how to snychronize EyeLink data (.edf) within brainstorm with your raw data. Information about the EyeLink can be found at ''http://www.sr-research.com/index.html.'' == Requirements == For this function to work, you need specific markers, which are stored within '''both''' EEG/MEG '''and''' eye tracker data '''at the same time.''' The exactly same amount of this marker type has to be available in both data sets. They can, however, have different names. == Procedure == ... == Process options == ... == Additional documentation == * Forum: Development of eye tracker support http://neuroimage.usc.edu/forums/showthread.php?2193-Is-eye-tracker-data-support-interesting-to-Brainstorm