SR Research EyeLink Portable Duo User Manual page 104

DATA NOTATIONS
<eye>
<time>
<stime>
<etime>
<dur>
<axp>, <ayp>
<sxp>, <syp>
<exp>, <eyp>
<aps>
<av>, <pv>
<ampl>
<xr>, <yr>
4.9.3.1 Messages
MSG <time> <message>
•
A message line contains the text of a time stamped message. A message is
typically sent to the EyeLink tracker by an application. It contains data for
analysis or timestamps important events such as display changes or participant
responses. The <message> text fills the entire line after the timestamp and any
blank space following it.
4.9.3.2 Buttons
BUTTON <time > <button #> <state>
•
Button lines report a change in state of tracker buttons 1 through 8. The
<button #> reports which button has changed state. The <state> value will be 1
if the button has been pressed, 0 if it has been released. Tracker buttons may
be created to monitor any digital input port bit, and may be created by link
commands or in the tracker configuration file BUTTONS.INI or FINAL.INI.
4.9.3.3 Block Start & End
START <time> <eye> <types>
•
END <time> <types> RES <xres> <yres>
•
94 Data Files
© 2016-2017 SR Research Ltd.
which eye caused event ("L" or "R")
timestamp in milliseconds
timestamp of first sample in milliseconds
timestamp of last sample in milliseconds
duration in milliseconds
average X and Y position
start X and Y position data
end X and Y position data
average pupil size (area or diameter)
average, peak velocity (degrees/sec)
saccadic amplitude (degrees)
X and Y resolution (position units/degree)