- The Chedoke Arm and Hand Activity Inventory (CAHAI) will be administered at the start and end of the study scale to measure changes in functional recovery of the arm and hand. 4 This is a valid, clinically relevant, responsive functional assessment of the recovering paretic upper limb and uses bilateral, real-life items. Successful changes in this test will be defined as a predetermined minimum increase in scores. This inventory will provide two types of information: 1st baseline measures of the severity of the individual's impairment and functional levels. This will help identify which groups of stroke patients are best suited for this product in the home