Figure 1

(A) Average Task-Space Accuracy \(A_{sum}\) (along trials and participants) over the 4 days; (B) average Thickness (along trials and participants) over the 4 days, neglecting the discarded outliers; (C) Shape Index averaged along trials and participants over the 4 days, neglecting outliers; (D) correlation between Thickness and Task-Space Accuracy. Pearson’s \(R = 0.62\) with a \(p = 3.8 \times 10^{-6}\). Within box-plots (A–C), red crosses represent the data labelled as outliers by the MATLAB™ function boxplot, net of neglected outliers on the basis of Thickness analysis.