User manual

An EyeLink 1000 Tutorial: Running an Experiment

every joint. Furthermore, the LCD display can be tilted forward or backward

and rotates around the swivel joint that attaches it to the Arm.

Ideal positioning of the Arm Mount places the LCD display:

• perpendicular to the viewer’s line of sight,

• with their gaze centered, and

• intercepting the top of the display.

If the viewer is sitting upright in a chair, this means than the monitor should

form a right angle to the floor, and that their gaze should strike the monitor in

the middle and in the top 25% of the display area.

If the observer is reclining, then place the monitor surface so that it is

perpendicular to, and in front of their face.

A final important consideration, particularly for monocular viewing with head

stabilization is the distance between the LCD display and the observer. The

PHYSICAL.INI file (see the Installation Guide) specifies the viewing distance

between the observer and the monitor, as well as the monitor dimensions. For

the EyeLink Remote, viewing distance is computed dynamically, so setting the

display to match the settings in PHYSICAL.INI is not crucial. For highly

accurate monocular data collection however, the distance between the LCD

display and the viewer should match the distance specified in PHYSICAL.INI as

closely as possible. Having a tape measure handy to check that Arm positioning

is at the viewing distance specified in PHYSICAL.INI is a good idea.

For instructions pertaining to the assembly, disassembly and transport of

the Arm Mount, see the EyeLink 1000 Installation Guide.

Now that the Arm Mount is in place, to continue the setup tutorial, go to either

“Section 3.2.3 Desktop Mount (Level) Participant Setup, Monocular” or “Section

3.2.4 EyeLink Remote Participant Setup” if using the system without head

stabilization (Remote licensing required). Keep in mind that most references to

the Desktop Mount in these sections will not apply.

3.2.3 Desktop Mount (Level) Participant Setup, Monocular

The EyeLink Desktop Mount can be configured to track monocular eye

movements up to 2000 Hz or binocular movements up to 1000 Hz depending on

the system model. Take the following steps if you plan to set up the EyeLink

1000 Desktop Mount for monocular tracking.