Table 2 Summary of discrimination tasks
| Participant | Discrimination task |
Total conditions | Number of trials | Electrode(s) | Percept(s) |
|---|---|---|---|---|---|
| S3 | Location | 5 | 35 | 46 | D4 tip |
| 66 | D5 tip | ||||
| 23 | Palm | ||||
| 48 | Wrist | ||||
| 46, 66, 23, 48 (simultaneous) | D4 tip, D5 tip, palm, wrist | ||||
| S3 | Location | 4 | 24 | 26 | Palm |
| 45 | D5 tip | ||||
| 26, 45 (simultaneous) | Palm, D5 tip, merging sensation | ||||
| 26, 45 (interleaved) | Palm, D5 tip | ||||
| S4 | Location | 8 | 24 | none | none |
| 16 | D5, palm | ||||
| 28 | D5 side, | ||||
| 36 | D4 Tip | ||||
| 16, 28 | D5, palm, D5 side | ||||
| 16, 36 | D5, palm, D4 tip | ||||
| 28, 36 | D5 side, D4 tip | ||||
| 16, 28, 36 | D5, Palm, D5 side, D4 tip | ||||
| S3 | Quality | 2 | 30 | 39 | Tingle |
| 44 | Vibration | ||||
| S5 | Intensity | 4 | 20 | none | none |
| 76 (35 Hz) | Light pressure | ||||
| 76 (70 Hz) | Medium pressure | ||||
| 76 (100 Hz) | Heavy pressure | ||||
| S5 | Location-intensity | 10 | 30 | none | none |
| 66 (30 Hz) | D3, light pressure | ||||
| 66 (70 Hz) | D3, medium pressure | ||||
| 66 (100 Hz) | D3, heavy pressure | ||||
| 59 (30 Hz) | Palm, light pressure | ||||
| 59 (70 Hz) | Palm, medium pressure | ||||
| 59 (100 Hz) | Palm, heavy pressure | ||||
| 8 (30 Hz) | D2, light pressure | ||||
| 8 (70 Hz) | D2, medium pressure | ||||
| 8 (100 Hz) | D2, heavy pressure | ||||
| S5 | Location-intensity | 7 | 40 | none | none |
| 18 (100 Hz) | D2, 20° flex | ||||
| 18 (50 Hz) | D2, 50° flex | ||||
| 18 (150 Hz) | D2, 180° flex | ||||
| 24 (30 Hz) | D3, 10° flex | ||||
| 24 (80 Hz) | D3, 90° flex | ||||
| 24 (150 Hz) | D3, 180° flex |