Guideline 1: Event files should be organized by event. Event files should report one event marker per line. Event files should contain markers (lines) for all onsets and offsets of relevant sensory stimuli, motor actions, participant tasks and task conditions, condition changes during the recording, time organization, plus setup meta-event information organized during event design. When computation of response times, delays, or results of other computations on the basic event data are stored in a column added to an event table, the event table should still include rows representing the onsets and offsets of the actual framing events used to compute these response times or delays to avoid the complications of interleaving events.