Training Environments: Motivation and Feedback: Training will be done in the Dept. of Occupational Therapy located at the Sheba Medical Center. Training environments will allow us to evaluate the effect of combining different degrees of motivation and feedback on motor outcome. Environment 1 is highly motivating (novel and fun) since training is presented as a game in which the learner tries to beat his own score in subsequent sessions. Targets are presented as balls in a video-based VR system (Gesture Xtreme). The patient sits in front of a 36 inch display of the 6 target scene. The patient's image is captured by a video camera and inserted into the scene displayed on the monitor. The task is to point to each of the targets which appear in a random sequence. Feedback will provide pertinent information for motor learning (KR, KP, game score). Environment 2 incorporates the same number and disposition of targets as Env. 1 but they will be presented in a physical environment on a wooden frame in front of the subject. KR and KP feedback will be provided as verbal cues by the experimenter as is done usually in the clinic. However, they will be no additional motivational information (game score).