Given the nature of the movement tasks, the number of movement metrics derived from the tapping task was higher than from the pressing tasks. This may have increased the likelihood that we would find differences by chance in certain movement metrics for tapping compared with pressing. To address this issue, we additionally performed an ANOVA with the factor group (patients, controls) for the variable EMG slope. We found a significant interaction effect between Group and Task [F(1,37) = 17.97, P < 0.001], which suggests that the behavioral comparison between groups was different in the pressing and slow tapping tasks in terms of the EMG slope.
