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Table 4 Results for the EEG database (scenario 2)

From: Time–frequency based feature selection for discrimination of non-stationary biosignals

Original size of thet–f representation: 512×500=256000. Number of neighbors: 3
Methodology ρ min n rel n =( n c × n r ) Accuracy (%) Sensitivity (%) Specificity (%)
PCA with NA NA 15=(3×5) 94.00±3.65 (ZO) 94.50±4.38 95.67±4.17
Tiling [5]      (NF) 98.50±2.42 95.67±3.17
      (S) 84.00±10.75 99.00±1.29
PLS with NA NA 15=(3×5) 93.60±3.37 (ZO) 94.00±4.59 95.67±4.17
Tiling [5]      (NF) 98.50±2.42 95.33±2.81
      (S) 83.00±10.59 98.75±1.32
Vectorized NA NA NA 93.40±4.12 (ZO) 97.00±4.22 94.00±2.63
PCA [14]      (NF) 93.50±4.12 97.00±3.31
      (S) 86.00±16.47 98.50±2.11
Vectorized NA NA NA 96.00±2.98 (ZO) 100.00±0.00 95.33±3.58
PLS [14]      (NF) 95.50±4.97 98.00±2.81
      (S) 89.00±11.01 100.00±0.00
Algorithm 2 + NA NA NA 98.00±1.88 (ZO) 100.00±0.00 98.66±2.33
2D–PCA      (NF) 99.00±2.10 98.00±2.33
(no relevance)      (S) 92.00±7.88 100.00±0.00
Algorithm 2 + NA NA NA 98.20±1.13 (ZO) 100.00±0.00 98.33±2.35
2D–PLS      (NF) 99.00±2.10 98.66±1.72
(no relevance)      (S) 93.00±4.83 100.00±0.00
Method 1 50% 128000 20 94.40±2.95 (ZO) 99.00±2.11 94.00±4.10
      (NF) 91.50±6.69 97.00±4.29
      (S) 91.00±11.97 99.75±0.79
Method 2 15% 38400 25 94.80±3.29 (ZO) 95.00±4.71 95.00±4.23
      (NF) 95.00±3.33 97.33±2.63
      (S) 94.00±8.43 99.25±1.21
Method 3 15% 38400 9 97.80±1.14 (ZO) 98.00±2.58 99.33±1.41
      (NF) 98.00±2.58 98.00±1.72
      (S) 97.00±4.83 99.25±1.21
Method 4 10% 25600 13 98.20±1.99 (ZO) 98.50±2.42 99.00±2.25
      (NF) 98.50±3.37 98.00±1.72
      (S) 97.00±4.83 100.00±0.00
Method 5 50% 128000 425=(17×25) 98.80±1.03 (ZO) 100.00±0.00 99.00±1.61
      (NF) 99.00±2.11 99.33±1.49
      (S) 96.00±5.16 99.75±0.79
Method 6 45% 115200 442=(17×26) 98.40±1.26 (ZO) 100.00±0.00 99.33±1.41
      (NF) 99.00±2.11 98.33±2.36
      (S) 94.00±6.99 99.75±0.79
Method 7 45% 115200 42=(3×14) 98.60±0.97 (ZO) 100.00±0.00 99.00±1.61
      (NF) 98.00±2.58 99.33±1.41
      (S) 97.00±4.83 99.50±1.05
Method 8 40% 102400 784=(28×28) 98.80±1.03 (ZO) 100.00±0.00 99.33±1.41
      (NF) 99.50±1.58 98.67±1.72
      (S) 95.00±5.27 100.00±0.00
  1. Best performance obtained for the methodologies studied using the EEG database (scenario 2).