Figure 7.

(a,b) Visualization of the 95% confidence boundaries for the spectral contents of input-output pairs in validation and test sets, respectively. The solid lines indicate the mean of spectral contents and the highlighted area indicate confidence boundaries. Also note that the y-axis on the right represents the $p-value$ between the spectral contents of the input and output signals. (c,d) Visualization of standard deviation boundaries for input-output pairs along with the mean of spectral contents of input and output signals in validation and test sets, respectively. Please note that the spectral contents of the input signals are shown in “red” color, while those of the output signals are depicted with “blue” color. The dominant activity at around 5 Hz is only observed in the input signals (“red” color), which is expected due to the strong power of pathological tremor around 5 Hz.