Changes & implementation decisions

• Name eye-tracking events with suffix et_events for now
• Create beh folder in the sync_eyelink function
• Set find_overlaps parameter of read_raw_eyelink to False until we learn more about combining binocular data
• Remove appending eye-tracking _raw_extras to the EEG ones because we found out it does not work this way
• Mark all eye-tracking events in the annotations with ET and add them to the EEG annotations (instead of only marking the synchronisation events)
  • Disadvantages: We have duplicate experimental events, we have eye movement events (e.g. saccades) in the annotations as well as in the et_events.tsv
  • Advantages: It's possible to check the synchronisation using the onsets from the annotations, we don't lose events like BAD_ACQ_SKIP and don't have to put extra (custom) effort in the pipeline to extract them (but shift that to a later preprocessing step)
• For the eye-tracking events, combine saccades, fixations and blinks data frames from _raw_extras
• Synchronize onset and end_time of the eye-tracking events by recalculating the regression coefficients from the EEG+ET synchronisation

Before merging …

• Changelog has been updated (docs/source/changes.md)