Table 2.
Average errors of two eye-tracking devices. Each error cell is the average of absolute median errors across fifty gaze points for each participant.
| Horizontal error (in pixels) | Vertical error (in pixels) | Diagonal error (in pixels) | ||||
|---|---|---|---|---|---|---|
| Participant | EyeX | X2-30 | EyeX | X2-30 | EyeX | X2-30 |
| 1 | 8 | 9 | 21 | 10 | 23 | 15 |
| 2 | 13 | 17 | 32 | 17 | 36 | 27 |
| 3 | 9 | 10 | 16 | 17 | 19 | 22 |
| 4 | 10 | 21 | 21 | 19 | 24 | 30 |
| 5 | 16 | 15 | 22 | 12 | 30 | 21 |
| 6 | 5 | 10 | 14 | 11 | 16 | 16 |
| 7 | 9 | 14 | 12 | 14 | 16 | 22 |
| 8 | 8 | 14 | 16 | 22 | 19 | 29 |
| 9 | 11 | 16 | 14 | 21 | 20 | 28 |
| Average | 9.9 | 13.9 | 18.6 | 15.7 | 22.6 | 23.3 |
| Difference (95% CI) | -4 (-6.8, -1.4) | 2.9 (-3.2, 8.7) | -0.7 (-6.6, 5.1) | |||