Figure 1. System setup and target locations.

a) System Setup. The red cross is the target and the red dot is the cursor representing the hand position. b) Targets setup, the short and long arrows (dashed and sloid) show the length of the short (10 cm) and long motions (15 cm), accordingly. c) The arrows point to a typical 4 target sequence starting at target 1. Once reaching a target a limited selection was avilable for the next one. For instance, from target number 3 only target 2 or 4 would have been valid (in the currnet case, target 4 was reached).