8.
Switch the input source of the primary screen (used for stimulus presentation) to the external device used for generating
the stimuli (DVD player, gaming console, etc.)
6.5
E-prime Setup
The setup described in this section is a two-computers setup using Tobii Studio to record the gaze data and E-Prime® to
present the stimulus. The E-Prime® software and Tobii Studio software are run on two different computers and communicate
with the Tobii Eye Tracker as well as between each other over a LAN network.
The image from the Tobii Studio computer has to be displayed on the stimulus display during calibration (to display the calibra-
tion points), whereas the E-Prime® computer should be shown on the stimulus display during the actual test. Therefore, both
computers have to be connected to the stimulus display. Two secondary screens can be added to the setup to enable the eye
tracker operator to monitor the progress of the trial during the stimulus presentation and recording.
The image or video presented by E-Prime® on the eye tracker
’
s display also has to be recorded by Tobii Studio and synchron-
ized with the gaze data. The image or video recording is done via a video capture card installed on the Tobii Studio computer. As
a result, the display output of the E-Prime® needs to be split in two connections: one to the eye tracker
’
s display and another to
the video capture computer card on the computer running Tobii Studio. For recommended components please refer to the Tobii
System Recommendations available on
www.tobii.com
.
To configure this type of setup:
1.
Mount the eye tracker on the screen as instructed in
4.2.1 Mounting the Tobii X2 Eye Tracker to a Screen, page 6.
2.
Connect the eye tracker USB to the Tobii X2
–
60 external processing unit as instructed in section
4.3 Connecting the To-
bii X2-60 Eye Tracker external processing unit, page 9
3.
Connect the screens to the computer via VGA/DVI as described in the illustration.
4.
Connect the E-Prime computer to the video capture card attached to the eye tracking computer and to the primary
screen that is used for stimuli presentation as described in the illustration.
5.
Run the Tobii Eye Tracker Installer and connect the external processing unit Ethernet cable to the network router and
your computers. For instructions, please read
4.4 Tobii Eye Tracker Installer, page 9.
6.
When positioning the participant in front of the eye tracker, make sure to take into consideration the guidelines in section
5 Positioning.
7.
Run Tobii Studio and setup your test by using the external video feature. For details about how to connect the eye tracker
in Tobii Studio and further instructions on using Tobii Studio, and E-Prime please refer to the documentation available on
www.tobii.com
. and
www.pstnet.com
.
Tobii X2-60 Eye TrackerUser
’
s manual v.1.0.3 - en-US
6 Typical Setups
25
