Figure 3

Ensembled RMS and PSD across n = 32 subjects. For each subject, the median RMS values across all sEMG electrodes, all conditions, and all trials are quantified. Thus, there is a distribution of 32 ensembled RMSs for 32 subjects. The same method is used for generating the distribution of ensembled PSD (considering 20 to 200 Hz). The Friedman test was not significant for either RMS or PSD of sEMG (RMS: Friedman Chi\(^{2}_{(2,62)} = 4.75, p = 0.0930\), PSD: Friedman Chi\(^{2}_{(2,62)} = 3.25, p = 0.1969\)). The conformity ratio was equal for both RMS and PSD (C = 22%).