Müsseler, J. & Skottke, E.
RWTH Aachen University, Germany
With regard to the ideomotor principle, the anticipations of action effects fulfill a generative function in motor control. When using a lever tool, subjects have to deal with two, not necessarily concordant effects of their actions: The body-related proximal effects, like tactile sensations from the moving hand, and/or representations of more external distal effects, like the moving effect points of a lever. As in tool use the intentional goal is usually directed to the distal effects, they should be predominant. Various studies tried to determine the spatial compatibility relationships between stimulus (S; at which the effects point of the lever have to aim at), respond hand (R) and effect point of the lever (E). However, in none of these studies a tool was used allowing to vary orthogonally compatible and incompatible SR, SE or RE relationships. The present study examine a tool, which fulfill these requirements.