Virtual Reality Eye Tracking Experiment

The experiment was controlled by a desktop computer running an HTC Vive Virtual Reality device equipped with an SMI eye tracker. The HTC Vive headset has a resolution of 1080 x 1200 pixels, with a 110° by 113° field of view and a refresh rate of 90 Hz. The virtual experimental set-up was built using the Unity platform (Unity Technologies, 2017) [31 ]. The SMI eye tracker has a sampling rate of 250 Hz and was controlled using the SMI-designed Unity plugin. Tracking accuracy was maintained by performing a calibration every 20 trials. Calibration consisted of following a moving white circle with a red dot in the middle to 5 different regions. The SMI Unity plugin reports only success or failure of calibration, not accuracy, so calibration was repeated upon failure. Head movements (movements of the HTC Vive headset) were tracked using inertial measurement units inside the headsets that were calibrated via two infrared base stations (60 Hz) located on opposite corners of the room [32 (link)].

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Bischof W.F., Anderson N.C, & Kingstone A. (2023). Eye and head movements while encoding and recognizing panoramic scenes in virtual reality. PLOS ONE, 18(2), e0282030.

Publication 2023

Unity platform

Device Head movements Movements

Corresponding Organization : University of British Columbia

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Variable analysis

independent variables

None explicitly mentioned

dependent variables

None explicitly mentioned

control variables

Desktop computer running an HTC Vive Virtual Reality device equipped with an SMI eye tracker
HTC Vive headset with resolution of 1080 x 1200 pixels, 110° by 113° field of view, and 90 Hz refresh rate
Unity platform (Unity Technologies, 2017) used to build the virtual experimental set-up
SMI eye tracker with 250 Hz sampling rate, controlled using the SMI-designed Unity plugin
Calibration of the SMI eye tracker performed every 20 trials
Head movements tracked using inertial measurement units inside the HTC Vive headsets, calibrated via two infrared base stations (60 Hz) located on opposite corners of the room

positive controls

None mentioned

negative controls

None mentioned

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