Fig. 2: Imagery-related speed gain as a function conditions in both groups.

Stars indicate significant post-hoc differences—Student’s t tests—with a level of significance of p < 0.05, corrected using the Bonferroni procedure. A positive score indicated that the participants took less time to imagine the actions compared to the execution of the actions (hands are represented in white, tool in black, tool/distance AB in dark gray, tool/distance AC in light gray, and error bars correspond to standard errors.