| EFA | Eigenface analysis |
| QR-EFA | Quick eigenface analysis |
| BCI | Brain computer interface |
| EEG | Electroencephalogram |
| CSP | Common spatial pattern |
| C3D3a_4C | BCI competition III dataset IIIa for four classes |
| C4D2a_4C | BCI competition IV dataset IIa for four classes |
| PCA | Principal component analysis |
| ICA | Independent component analysis |
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