88
Data Files
©
2016-2017 SR Research Ltd.
GAZE,GAZERES,AREA,HREF,VELOCITY
- default: all useful data
GAZE,GAZERES,AREA,FIXAVG,NOSTART
- reduced data for fixations
GAZE,AREA,FIXAVG,NOSTART
- minimal data
4.6.3 Event Types
The "file_event_filter" command specifies what type of events will be written to
the EDF file. It may be changed in the DATA.INI file of the EyeLink tracker, or
may be sent over the link. The command is followed by a list of data types and
options, selected from the list below:
Keyword
Effect
LEFT, RIGHT
Sets the intended tracking eye (usually include both LEFT and
RIGHT)
FIXATION
includes fixation start and end events
FIXUPDATE
includes fixation (pursuit) state update events
SACCADE
includes saccade start and end events
BLINK
includes blink start and end events
MESSAGE
includes messages (ALWAYS use)
BUTTON
includes button 1-8 press or release events
INPUT
includes changes in input port lines
The following is an example command illustrating the default event
configuration:
file_event_filter= LEFT,RIGHT,FIXATION,SACCADE,BLINK,MESSAGE,BUTTON
4.7 EDF File Utilities
A number of utility programs are included in the EyeLink eye tracker package,
to process and view EDF files. The utility EDF2ASC translates EDF files into
text ASC files for processing with user applications.
On Windows, a VisualEDF2ASC converter is bundled with the EyeLink Data
Viewer software (
https://www.sr-support.com/forums/showthread.php?t=10
).
After installation, the converter can be found at “Start -> Programs -> SR
Research -> EyeLink -> Utilities -> VisualEDF2ASC”. A command line version of
the converter is bundled with the EyeLink Developers Kit for Windows
(
https://www.sr-support.com/showthread.php?6
). On Mac OS X, there is a GUI
version of the converter called EDFConverter, which can be found at
https://www.sr-support.com/forums/showthread.php?t=17
. A command line
