Eye Tracker Comparison
| Model | EyeLink Portable Duo
| EyeLink 1000 (Plus)
| Tobii Spectrum
| Tobii Fusion
| Tobii Spark
|
| Sampling frequency | 2000 Hz head stabilized 1000 Hz head free-to-move | 2000 Hz head stabilized 1000 Hz head free-to-move | 300, 600 or 1200 Hz (depends on model) | 120 or 250 Hz (depends on model) | 60 Hz |
| Portability | Portable: one carry-on bag | Not portable | Portable if absolutely necessary, comes with a huge case. We currently have one Tobii Spectrum in PdlC (1B24), this one is not portable. | Portable | Portable |
| Data quality | Accuracy: down to 0.15° typically 0.25 - 0.5° for both head supported and head free
| Accuracy: down to 0.15° (only head supported) typically 0.25 - 0.5° for both head supported and head free
| Accuracy: 0.15° head supported 0.17° head free | Accuracy: 0.3° in optimal conditions
| Accuracy: 0.45° in optimal conditions
|
Precision (noise): 0.03 – 0.05° raw signal, no filter
| Precision (noise): 0.02 – 0.04° raw signal, no filter
| Precision (RMS): 0.06° optimal conditions, head supported 0.08° optimal conditions, head free
| Precision (RMS): 0.2° raw signal, no filter
| Precision (RMS): 0.26° optimal conditions, with built-in filter
| |
| Blink recovery: 0.5 ms @ 2000 Hz | Blink recovery: 0.5 ms @ 2000 Hz | Blink recovery: 3.3ms @ 300 Hz, 1.67 ms @ 600 Hz, 0.83 ms @ 1200 Hz | Blink recovery: 8.3 ms @ 120 Hz, 4 ms @ 250 Hz)
| Blink recovery: 16.67 ms @ 60 Hz | |
| Gaze recovery: not reported | Gaze recovery: not reported | Gaze recovery: < 150 ms | Gaze recovery: 250 ms
| Gaze recovery: 50 ms
| |
| Head movement | Head stabilized: 2.5 x 2.5 cm Head free: 20 x 20 cm at 52 cm distance | Head stabilized: 2.5 x 2.5 cm Head free: 22 x 18 cm | 34 x 26 cm at 65 cm distance | 40 x 25 cm at 65 cm distance | 20 x 20 cm at 50 cm distance 35 x 35 cm at 65 – 80 cm distance |
| Reading research | Yes | Yes | Yes | Has been used in reading research (see publications on Tobii website: Scientific publications with Tobii eye tracking - Tobii) | No |
| Software |
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| Usability | Setting up and calibrating the EyeLink eye trackers requires some expertise. The software Experiment Builder and Data Viewer also require some expertise, but seem more flexible and have more options than Tobii Pro Lab. SOLO does not have experience with Experiment Builder and Data Viewer yet, but can acquire experience if EyeLink becomes more widely used. EyeLink provides adequate instructions and provides good support through their forum. In sum, using the EyeLink hardware and software requires expertise, but is reliable and offers more options than Tobii. | Tobii Pro Lab and the eye trackers are easy to use. The portable eye trackers are plug-and-play. The Spectrum requires some expertise to set-up. SOLO has experience with Tobii hard- and software. SOLO has experienced many (small) bugs in Tobii Pro Lab and Tobii Pro Lab occasionally crashes unexpectedly. The Tobii Fusion eye tracker has exhibited several issues/bugs. Tobii support can be reached easily and tries to help however they can, unfortunately they are unable to help at times. In sum, the Tobii hardware and software are generally easy to use, but have shown issues in the past. | |||
