Tobii X1 Light Eye Tracker, Руководство пользователя

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Tobii X1 Light User Manual
22
4.3 Positioning
The distance from the person’s eyes to the eye tracker should be approximately
~65 cm (26’’) . However, the eye tracker can still track eye movements as long as
the person in front of the eye tracker stays within 50 to 80 cm distance from the eye
tracker. If the eye tracker is too close or too far away from the test subject there is a
risk of losing some of the gaze data.
When the Tobii X1 Light Eye Tracker is used in a setup where any of the brackets are
not used, it should be placed
below the monitor
(or below the surface that is to be
studied) without covering the bottom of the display area for the person watching the
stimuli.
For optimal tracking the eye tracker should be placed so that the gaze angle will not
exceed ~
27º to any point on the display area (or other stimuli used) (see images
below).
Max 27 °
65 cm 26’’
It is very important to have the correct
distance to the monitor, or the tracked
object. Otherwise the eye tracker cannot
track the entire area. If the monitor or object
is placed too close to the participant there
is a risk that the gaze data for the corners of
the display area of the monitor will not be
collected (see image to the left).
Max
27 °
Max
27
°
Max
27
°
Chapter 4 Assembling the Tobii X1 Light Eye Tracker