Table 5.
Effect of referencing, filtering, and dimension reduction on classification accuracy for the 18-subject 64-channel Biosemi visual oddball experiment.
| Signal type | Classifier | |||||||
|---|---|---|---|---|---|---|---|---|
| LDA | LDA + PCA (50 dim.) | HDCA | HDCA + PCA (45 ch.) | |||||
| SS | LOSO | SS | LOSO | SS | LOSO | SS | LOSO | |
| HP 0.3 Hz | 56.8 | 68.5 | 86.8 | 74.6 | 75.5 | 71.6 | 75.8 | 77.9 |
| HP 1.0 Hz | 56.3 | 69.6 | 87.3 | 75.7 | 90.7 | 82.2 | 91.1 | 84.6 |
| HP 0.3 Hz + RR | 63.5 | 69.5 | 89.3 | 78.1 | fail | fail | 78.5 | 79.3 |
| HP 1.0 Hz + RR | 66.0 | 71.3 | 90.5 | 79.1 | fail | fail | 91.7 | 86.5 |
Values are reported as AUC. SS, single subject classification; LOSO, leave-one-subject-out classification; RR, robust referencing with channel interpolation.