Fig. 4.

Course of performances at the test workspace (untrained region) in baseline, initial exposure, and final evaluation phases for an example subject (from end-point field, non-aligned display group). Linear regression failed to yield non-zero slopes for left and right arm initial exposure phases and left and right arm final evaluation phases (p = 0.43, 0.12, 0.36, and 0.16, respectively). Thus, the level of performance for the initial exposure and final evaluation phases were approximated to mean values (big open circles). Exponential regression for the training phase had root-mean-squared error of 0.09