Fig. 4
From: Human arm weight compensation in rehabilitation robotics: efficacy of three distinct methods
Mean effort index (MEI) results of the methods for all poses over all subjects: The boxplot shows the subjects’ activity according to the MEI over the five tested poses Pi for each of the three arm weight compensation methods in healthy subjects. The whiskers end at the most extreme data points, the median is displayed, and the bottom and top box edges show the 25th and 75th percentile respectively