The influence of uncertainty and premovement visual information on manual aiming.

Conducted 2 experiments in which target uncertainty and the visual information available before and during a target-aiming movement were varied. 10 undergraduates participated in each of the studies. In both experiments, target uncertainty failed to interact with the visual manipulations. Findings support the idea that a visual representation contains general information about the layout of the movement environment. Data also provide evidence against the notion that a specific motor program is structured while vision is available and executed later. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)