Research Article

Multisubject Learning for Common Spatial Patterns in Motor-Imagery BCI

Table 2

Classification accuracies per subject for the MPI set.

5 trials 10 trials 20 trials
𝜆 2 = 1 0 − 1 𝜆 2 = 1 0 − 2 𝜆 2 = 1 0 − 4
Subject bCSP clmtCSP bCSP clmtCSP bCSP clmtCSP

1 0.80 0.68 0.78 0.73 0.85 0.85
2 0.85 0.83 0.83 0.77 0.87 0.85
3 0.45 0.43 0.53 0.57 0.58 0.60
4 0.58 0.53 0.72 0.75 0.77 0.77
5 0.53 0.47 0.52 0.48 0.62 0.60
6 0.58 0.67 0.60 0.60 0.70 0.70
7 0.83 0.92 0.90 0.92 0.95 0.95
8 0.38 0.52 0.48 0.48 0.53 0.53
9 0.57 0.70 0.58 0.62 0.63 0.63
10 0.68 0.53 0.60 0.62 0.63 0.60
11 0.50 0.53 0.42 0.52 0.40 0.43
12 0.52 0.68 0.65 0.70 0.63 0.63
13 0.62 0.60 0.63 0.58 0.57 0.60
14 0.53 0.53 0.50 0.47 0.55 0.57

Mean 0.68 0.70 0.70 0.70 0.71 0.71