Table 1.
Degradation in classification accuracy across sensor positions
| Participant | Accuracy C3 (%) | A1-A3 | A2-A3 | A4-A3 | A5-A3 |
|---|---|---|---|---|---|
| ΔC1,3 | ΔC2,3 | ΔC4,3 | ΔC5,3 | ||
| 1 | 69.8 ± 4.3 | 7.5 ± 4 | 6.5 ± 4 | 6.8 ± 3 | 1.9 ± 3 |
| 2 | 71.0 ± 5.9 | 4.0 ± 4 | 6.9 ± 5 | 1.5 ± 5 | 2.0 ± 4 |
| 3 | 69.6 ± 4.5 | 5.7 ± 4 | 6.6 ± 4 | 7.7 ± 5 | 7.4 ± 5 |
| 4 | 74.6 ± 2.7 | 11.4 ± 4 | 4.7 ± 4 | 10.0 ± | 7.5 ± 4 |
| 5 | 75.1 ± 4.2 | 11.8 ± 4 | 12.9 ± 4 | 1.7 ± 3 | 4.5 ± 4 |
| 6 | 69.1 ± 3.9 | 7.2 ± 5 | 5.7 ± 4 | 9.1 ± 5 | 1.5 ± 4 |
| 7 | 76.2 ± 4.3 | 14.9 ± 3 | 17.4 ± 3 | 4.6 ± 5 | 2.1 ± 4 |
| 8 | 71.2 ± 4.4 | 2.0 ± 3 | 0.8 ± 2 | 11.1 ± 5 | 3.6 ± 5 |
| 9 | 73.1 ± 3.0 | 5.9 ± 3 | 5.6 ± 3 | 7.2 ± 4 | 1.0 ± 3 |
| 10 | 76.4 ± 3.4 | 7.7 ± 4 | 1.0 ± 4 | 6.4 ± 3 | 0.9 ± 3 |
| 11 | 76.8 ± 3.0 | 1.4 ± 3 | 1.7 ± 2 | 4.9 ± 3 | 1.7 ± 3 |
| 12 | 69.7 ± 3.9 | 14.1 ± 5 | 12.2 ± 2 | 4.6 ± 3 | 4.9 ± 3 |
| Avg | 72.7 ± 0.6 | 7.8 ± 5 | 6.8 ± 6 | 6.3 ± 4 | 3.0 ± 4 |
Values shown are mean ± standard deviation across all trials. Bold and italic values indicate that Ci and C3 are significantly different (p < 0.05). Italic values indicate that the accuracy of the locally-trained classifier at this location was lower than that of A3, suggesting that this recording site yields signals that poorly reflect FCR activity.