Eyex eye tracker

Manufactured by Tobii

The EyeX eye-tracker is a hardware device designed to track and record a user's eye movements. It is a non-invasive, optical-based system that captures the position and movement of the user's eyes in real-time. The EyeX eye-tracker is intended for use in various applications that require eye-tracking data, such as research, usability testing, and interactive media.

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Lab products found in correlation

Matlab 2011b, by MathWorks (1 mentions) Hd280 pro headphones, by Sennheiser (1 mentions)

4 protocols using eyex eye tracker

Eyecatcher Visual Field Test Protocol

Cited 1 time

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The equipment for the Eyecatcher visual field test is shown in Figure 1A. Stimuli were displayed on a Microsoft Surface Pro 3 (Microsoft, Redmond, WA): a portable “tablet computer,” containing a screen measuring 25.4 × 16.9 cm (28.5° × 19.2° at the viewing distance of ∼50 cm). Eye movements were recorded monocularly at 50 Hz using a Tobii EyeX eye-tracker (Tobii Technology, Stockholm, Sweden): a low-cost (∼$100), near-infrared, remote eye-tracker, with a precision of < 0.6°.40 (link) Participants were sat approximately 50 cm from the screen. However, no chin rest was used, and participants were free to move their head. A constant stimulus size on the retina was maintained by scaling the screen-size of the stimulus trial-by-trial, based on the participant's current viewing distance (as measured by the EyeX eye-tracker, which also contains integrated head-tracking). The test was programmed in C# and R,41 using custom code.

Jones P.R., Smith N.D., Bi W, & Crabb D.P. (2019). Portable Perimetry Using Eye-Tracking on a Tablet Computer—A Feasibility Assessment. Translational Vision Science & Technology, 8(1), 17.

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EEG and eye-tracking data acquisition

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Stimulus presentation, data processing and storage were controlled by the BCI2000 software framework [39 (link)]. EEG data during BCI and EOG use was amplified with a g.USBamp (g.tec, Austria) with a sampling rate of 256 Hz, a bandpass filter from 1 to 30 Hz and a notch filter around 50 Hz. The EyeX eyetracker was connected to BCI2000 using the software development kit provided with the hardware by Tobii Technology. Recordings were made with a Hewlett-Packard ProBook 6460b with a dual-core CPU, 4GB of RAM and a 64-bit Windows 7.

Käthner I., Kübler A, & Halder S. (2015). Comparison of eye tracking, electrooculography and an auditory brain-computer interface for binary communication: a case study with a participant in the locked-in state. Journal of NeuroEngineering and Rehabilitation, 12, 76.

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Simulating Visual and Oculomotor Impairments in Typing Tasks

Cited 2 times

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Modifications were made to simulate VAI or OMI during both the calibration and copy-spelling tasks for those conditions. During the VAI condition, participants wore goggles (Fork in the Road, Madison, WI) designed to simulate 20/200 visual acuity. This method of simulation is consistent with other recent studies involving participants without visual impairments. [42 (link),43 (link)] During the OMI condition, a fixation circle with a diameter of 13° visual angle was centered in the keyboard area, and an EyeX eye tracker (Tobii, Danderyd, Sweden [44 (link)]) was used to ensure that participants kept their gaze within the circle. During pilot testing, a 13° circle was the smallest size that allowed some users to type successfully. If a participant looked outside the circle for more than 10% of the duration of a trial, she was notified by an alert sound and a change in the circle’s color, and was required to repeat that trial.

Peters B., Higger M., Quivira F., Bedrick S., Dudy S., Eddy B., Kinsella M., Memmott T., Wiedrick J., Fried-Oken M., Erdogmus D, & Oken B. (2018). Effects of simulated visual acuity and ocular motility impairments on SSVEP brain-computer interface performance: An experiment with Shuffle Speller. Brain computer interfaces (Abingdon, England), 5(2-3), 58-72.

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Multimodal Spatial Attention Tracking

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Participants completed the experiment within a double-walled IAC booth. Auditory stimuli were processed through MATLAB 2011b (MathWorks Inc., Natick, MA) software at a sampling rate of 44.1 kHz, delivered to a RME HDSP 9632 24-bit soundcard (ASIO) and presented to the listener through Sennheiser HD280 Pro headphones. Listeners were seated at a distance of 21 inches in front of a 34″ UltraWide, LG 34UM64-P monitor (32.5-inches wide from screen edges) on which visual stimuli were displayed. A TOBII eyex eye tracker affixed to the bottom of the monitor tracked the participant’s eye movements, and was calibrated for each individual participant using the TOBII calibration software. During the experiment, the eye tracker readings were probed by the Matlab software every 98 ms and rounded to the nearest 2° increment (within the range of −40° to +40°). All auditory conditions were simulated under headphones. A chair-mounted head and neck rest comfortably restrained the participant’s head, preventing overt head movements so as to minimize the influence of visual and auditory misalignment and to require participants to follow visual stimuli with their eyes. The subject made responses with a hand-held USB number keypad.

Roverud E., Best V., Mason C.R., Streeter T, & Kidd G J.r. (2018). Evaluating the Performance of a Visually Guided Hearing Aid Using a Dynamic Auditory-visual Word Congruence Task. Ear and hearing, 39(4), 756-769.

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