Marjorie B. Taylor, OTR, a pioneer in occupational therapy and theorist, described the orthopedic model of occupational therapy that still serves as the basis of therapy for people with orthopedic conditions. She described activities for strengthening particular muscles, adaptations to transform an activity into an effective exercise, and principles of gradation of activities. In describing this model, she stated that more than focusing on the physical defect, occupational therapists need to pay attention to the effect of the illness or accident on the patient’s personality and other problems he or she may have. Taylor defined occupational therapy to include purposeful activity.