Chosen striking location and the user-tool-environment system.

Controlling a hand-held tool requires that the tool user bring the tool into contact with an environmental surface in a task-appropriate manner. This, in turn, requires applying muscular forces so as to overcome how the object resists being moved about its various axes. Perceived properties of hand-held objects tend to be constrained by inertial variables that describe such resistance to movement. In 3 experiments, the authors investigated whether participants choose different striking locations on striking implements when using that implement under different constraints. The results suggest that the constraints of the striking task and the grasp position on the striking implement together contribute to the chosen striking location. Furthermore, such choices are constrained by inertial variables that reflect combinations of these constraints.

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