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Table 4 Inter-parameter agreement matrix

From: A novel approach to surface electromyography: an exploratory study of electrode-pair selection based on signal characteristics

Parameter RMS MAV MAX SSC ZC WL MNF MDF SMR DPR SNR Ω
Root mean square (RMS) 46 46 44 0 0 28 13 7 7 21 25 9
Mean absolute value (MAV) 44 44 42 0 0 27 13 8 7 22 25 9
Maximum amplitude (MAX) 38 39 39 0 0 24 12 7 4 18 23 7
Slope sign changes (SSC) 0 0 0 31 20 4 0 1 2 0 0 0
Zero crossings (ZC) 0 0 0 19 29 7 0 0 3 0 0 5
Waveform length (WL) 30 27 27 6 6 45 5 2 8 12 13 8
Mean Frequency (MNF) 13 14 13 0 0 5 42 30 5 20 17 5
Median Frequency (MDF) 6 7 7 2 1 1 34 42 4 13 11 1
Signal-to-motion artifact ratio (SMR) 2 3 3 1 1 2 0 0 4 2 2 1
Maximum-to-minimum drop in power density ratio (DPR) 12 14 14 0 0 5 12 9 4 26 25 8
Signal-to-noise ratio (SNR) 20 21 19 0 0 11 14 10 6 30 36 12
Power spectrum deformation (Ω) 8 7 7 2 5 8 1 0 5 7 10 30
  1. Each row considers cases that are considered repeatable based on the repeatability-4 criteria for a given parameter. The values indicate how many of these cases had a ranking of 1, for the same electrode pair, in at least 3 of the 5 trials for another parameter (column).