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- W2017624224 abstract "Unconstrained hand movements typically display a decrease in hand speed around highly curved sections of a trajectory. It has been suggested that this relation between tangential velocity and radius of curvature conforms to a one-third power law. We demonstrate that a one-third power law can be explained by models taking account of trajectory costs such as a minimum-jerk model. Data were analyzed from 6 subjects performing elliptical drawing movements of varying eccentricities. Conformity to the one-third power law in the average was obtained but is shown to be artifactual. It is demonstrated that asymmetric velocity profiles may result in consistent departures from a one-third power law but that such differences may be masked by inappropriate analysis procedures. We introduce a modification to the original minimum-jerk model by replacing the assumption of a Newtonian point-mass with a visco-elastic body. Simulations with the modified model identify a basis for asymmetry of velocity profiles and thereby predict departures from a one-third law commensurate with the empirical findings." @default.
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- W2017624224 date "1988-01-01" @default.
- W2017624224 modified "2023-10-16" @default.
- W2017624224 title "Relation between velocity and curvature in movement: Equivalence and divergence between a power law and a minimum-jerk model." @default.
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- W2017624224 doi "https://doi.org/10.1037//0096-1523.14.4.622" @default.
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