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Analysis of Accuracy in Pointing with Redundant Hand-held Tools: A Geometric Approach to the Uncontrolled Manifold Method
Figure 7
UCM ratio for seven subjects for the two experimental conditions, Exp I and Exp II (top).
Bottom figures show the 
ratio between Exp II and Exp I (left) and similarly for 
(right). The horizontal line marks the unitary ratio (i.e. no difference in the variance in position between Exp II and Exp I). Vertical lines represent the standard errors. Statistically significant differences are highlighted for 
(*), for 
(**), and for 
(***).
doi: https://doi.org/10.1371/journal.pcbi.1002978.g007