Participants are fitted with a cyberglove device (a lightweight glove with flexible sensors that measure the position and movement of the fingers and wrist) on their right hand. The glove is used to transform the subject's hand and finger motions into real-time digital joint-angle information. Subjects slowly open and close their hand while watching an artificial hand projected on a monitor. They continue practicing the exercise until they are comfortable with the cyberglove and have the sense that the artificial hand is a mirror representation of their own hand, accurately reflecting their hand's movements.