Table 4. 10-fold cross-validation of ambulatory SSVEP classification by the quantity of training data.
| 11,250 | 22,500 | 33,750 | 45,000 | 56,250 | 67,500 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | All | Low | All | Low | All | Low | All | Low | All | Low | All | |
| CCA-KNN | 79.51 (+3.04) |
84.64 (+3.24) |
79.28 (-3.11) |
84.49 (-1.69) |
79.16 (-6.43) |
84.41 (-4.38) |
79.29 (-8.56) |
84.52 (-6.14) |
79.36 (-12.09) |
84.58 (-8.72) |
79.46 (-12.87) |
84.65 (-9.38) |
| NN | 75.15 (-0.88) |
77.81 (-3.59) |
82.63 (+0.24) |
84.61 (-1.57) |
86.39 (-0.8) |
87.93 (-0.86) |
89.21 (+1.36) |
90.35 (-0.31) |
91.04 (-0.41) |
91.96 (-1.34) |
91.94 (-0.41) |
92.80 (-1.23) |
| CNN-2 | 59.21 (-17.26) |
68.31 (-13.09) |
73.77 (-8.62) |
79.78 (-3.4) |
78.95 (-6.64) |
83.99 (-4.8) |
82.52 (-5.33) |
85.77 (-4.89) |
83.91 (-7.54) |
87.75 (-5.55) |
85.16 (-7.19) |
88.36 (-5.67) |
| CNN-1 | 76.47 | 81.40 | 82.39 | 86.18 | 85.59 | 88.79 | 87.85 | 90.66 | 91.45 | 93.30 | 92.35 | 94.03 |
10-fold cross-validation of the ambulatory SSVEP classification when changing the number of training data with 7,500 test data. Low indicates subjects who have a low CCA accuracy (under 80%, i.e., subjects S3–7). In parentheses, the accuracy differences of the methods compared with CNN-1 are indicated.