Information utilization of motor-error tolerance range in visuo-motor system

When you try to decide whether you achieved an aim of any movement or not, you must take into account some “tolerance range” about the result. If the range is essential and important generally for human movements, you can think that a man can recognize this information prior to the movement onset and fully utilize it to program motor commands. For example, during a volleyball game, an excellent attacker could immediately recognize the “tolerance range for attacking” located among blockers and receivers in the opposite side and converge his attacking movement toward it. Another example is the reaching movement to a visually presented target. In this case, the size of the target implies an error tolerance range given (allowed) to the movement. Although you can find many kinds of movements related to that tolerance range, from the analytical point of view, experimental tasks should be simple enough to describe the results clearly