A study was conducted to evaluate performance of a man-machine interface system consisting of a human wearing a passive exoskeleton device. This experiment obtained some crude measures of human response characteristics treating the exoskeleton device as a complicated sensor array. A Fitt's law paradigm was used to help evaluate human performance. Fitt's law is commonly used in human performance studies and it characterizes human response in terms of speed-accuracy tradeoffs that occur as humans perform tasks. Empirical data were collected during tests involving five subjects run using five levels of speed-accuracy tasks. The results are analyzed. >