Virtual piano trainer. A: NJIT TrackGlove system, with the subject’s hand in the foreground and a screenshot of the Virtual Piano Trainer simulation in the background. B: Data for a single repetition of the Virtual Piano Trainer Simulation performed on Training Day 1 and another repetition on Training Day 8 performed by a representative subject. The horizontally hatched area represents the change in cued finger flexion secondary to training. Cued finger flexion angle increased slightly (top pair of lines). Non-cued finger flexion decreases more extensively (bottom set of lines) secondary to training, with the cross hatched area between the two lines indicating improved ability for finger individuation. C: Daily averages for finger fractionation score for HAS group subjects (open circles) and HAT group subjects (solid circles) during Virtual Piano Trainer simulation performance. Error bars represent the standard error of the mean. Please see text for further explanation of findings.