Goal-related feedback guides motor exploration and redundancy resolution in human motor skill acquisition
Fig 5
Location of learned solutions in motor and goal space at the end of training.
A-C: Artificial Agents. D-G: Human Participants. Panels A and D depict the central postures (mid-point of learned solutions) in motor space for all 100 agents and 20 participants (Cond H1: blue, Cond H2: red). Panels B and E depict the corresponding arm configurations in goal space, which shows that the reach-endpoints of the central postures cluster around the mid-point of the array of test targets. Panels C, F and G depict the average location of solutions relative to H1 and H2 across time (population mean and standard error of the projection on the line connecting H1 and H2). Both agents (C) and humans (test F, training G) are biased towards the starting home posture, but this bias is weaker in humans.