Panel (A) shows changes in the skill measure over the course of four blocks during one day of training (NoFTGTRANSFER = dark blue, FTGTRANSFER = dark green). Before and after the training, both groups performed 15 trials of the pinch force task with their left hand (FTGTRANSFER = light blue square, NoFTGTRANSFER = light green square). Note that, while both groups improved skill performance over time, the FTGTRANSFER group had a lower performance level, consistent with experiment 1, in both the fatigued and non-fatigued effector. Panel (B) shows the difference in performance between block 4 to block one for the right hand and block 2 - block one for the left hand in both groups. Performance in the left hand was significantly lower in the FTGTRANSFER compared to NoFTGTRANSFER. Panel (C) shows the learning rates and the true ∆ slope in comparison to randomly generated ∆ slopes after permutation. Similar to experiment 1, controls showed higher learning rates than the fatigued group.