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Table 1 Degradation in classification accuracy across sensor positions

From: The effect of accelerometer location on the classification of single-site forearm mechanomyograms

Participant Accuracy C3 (%) A1-A3 A2-A3 A4-A3 A5-A3
   ΔC 1,3 ΔC 2,3 ΔC 4,3 ΔC 5,3
1 69.8 ± 4.3 7.5 ± 4 6.5 ± 4 6.8 ± 3 1.9 ± 3
2 71.0 ± 5.9 4.0 ± 4 6.9 ± 5 1.5 ± 5 2.0 ± 4
3 69.6 ± 4.5 5.7 ± 4 6.6 ± 4 7.7 ± 5 7.4 ± 5
4 74.6 ± 2.7 11.4 ± 4 4.7 ± 4 10.0 ± 7.5 ± 4
5 75.1 ± 4.2 11.8 ± 4 12.9 ± 4 1.7 ± 3 4.5 ± 4
6 69.1 ± 3.9 7.2 ± 5 5.7 ± 4 9.1 ± 5 1.5 ± 4
7 76.2 ± 4.3 14.9 ± 3 17.4 ± 3 4.6 ± 5 2.1 ± 4
8 71.2 ± 4.4 2.0 ± 3 0.8 ± 2 11.1 ± 5 3.6 ± 5
9 73.1 ± 3.0 5.9 ± 3 5.6 ± 3 7.2 ± 4 1.0 ± 3
10 76.4 ± 3.4 7.7 ± 4 1.0 ± 4 6.4 ± 3 0.9 ± 3
11 76.8 ± 3.0 1.4 ± 3 1.7 ± 2 4.9 ± 3 1.7 ± 3
12 69.7 ± 3.9 14.1 ± 5 12.2 ± 2 4.6 ± 3 4.9 ± 3
Avg 72.7 ± 0.6 7.8 ± 5 6.8 ± 6 6.3 ± 4 3.0 ± 4
  1. Values shown are mean ± standard deviation across all trials. Bold and italic values indicate that C i and C3 are significantly different (p < 0.05). Italic values indicate that the accuracy of the locally-trained classifier at this location was lower than that of A3, suggesting that this recording site yields signals that poorly reflect FCR activity.