Table 1. AUs found to be associated with pain using the Human FACS interpretation method for experimental data.
| Experimental Data Pain AUs with HFI Method | ||||||||
|---|---|---|---|---|---|---|---|---|
| Action Unit | Chin Raiser (AU17) |
Nostril Dilator (AD38) |
Half Blink (AU47) |
Ear Rotator (EAD104) |
Eye White Increase (AD1) |
Inner Brow Raiser (AU101) |
Blink (AU145) |
Ears Forward (EAD101) |
| Percentage of all Pain video AUs |
7.23% | 10.54% | 12.35% | 13.86% | 5.72% | 13.25% | 7.83% | 8.73% |
| More Frequent in Pain Videos | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✗ | ✗ |
| Percentage Difference | 90.91% | 69.23% | 56.25% | 42.11% | 17.14% | 2.30% | -14.29% | -18.75% |