For several decades, scientists have investigated the process of acquiring skill, typically with healthy adults as they train to improve a specific skill and increasingly with people with motor disability. Gentile64 describes the stages of learning as first getting the idea of the movement, then developing the ability to adapt the movement pattern to environmental demands. In the initial stages the person learns to pay attention to the critical features of the action and is actively engaged in practice. Considering the patient as a learner involves setting up environments and methods of delivery that stimulate skill learning.