The work presented here discusses the experimental results from comparing Virtual Fixtures (VF) and Shared Control (SC) techniques for rehabilitation of fine motor skills. A prior concept called Haptic Attributes was used to design the Shared Control assistance algorithm. Eight trajectories were chosen from the VMI Test book and were used to train a candidate's non dominant hand using recorded samples from their dominant hands. The results were analyzed with respect to errors for time of completion, RMS position errors, magnitude of forces and shape of trajectory. Results indicate that VF and SC control sets perform similarly for simple trajectories with SC performing better for more complex trajectories.

This research compared visual (color), auditory (tone pitch), and tactile (vibration amplitude) displays of uncertainty in a threat avoidance task. Thirty participants used these displays to navigate through a simulated minefield, selecting paths that would minimize their chance of hitting a mine, while moving through the field as quickly and directly as possible. Results showed the participants in the visual condition to be the most conservative (safer but longer), while those in the auditory condition took the shortest (riskier) path. Interestingly, in terms of trial time, while all participants tended to improve their performance with respect to speed, participants in the tactile condition started out more slowly, but were similar in speed to the fastest, visual condition, by the end of the trials.

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