Research Article

Multisubject Learning for Common Spatial Patterns in Motor-Imagery BCI

Table 1

Classification accuracies per subject for the BCI competition data set.

5 trials 10 trials 20 trials 30 trials
𝜆 1 = 1 0 − 3 , 𝜆 2 = 1 0 − 1 𝜆 1 = 1 0 − 4 , 𝜆 2 = 1 0 1 𝜆 1 = 1 0 − 3 , 𝜆 2 = 1 0 − 1 𝜆 1 = 1 0 − 4 , 𝜆 2 = 1 0 1
Subject bCSP mtCSP bCSP mtCSP bCSP mtCSP bCSP mtCSP

aa 0.49 0.73 0.54 0.64 0.66 0.71 0.61 0.69
al 0.80 0.73 0.95 0.93 0.95 0.94 0.94 0.94
av 0.56 0.58 0.59 0.63 0.44 0.62 0.56 0.64
aw 0.69 0.57 0.69 0.56 0.66 0.58 0.55 0.54
ay 0.92 0.86 0.84 0.93 0.85 0.85 0.88 0.87

Mean 0.69 0.69 0.72 0.74 0.71 0.74 0.75 0.79