Table 2.

Parameters of Robotic Assessment

	Parameter	Definition	Direction of Improvement
Visually Guided Reaching	Speed Maxima Count	Number of speed peaks between two targets.	Count closer to 1
	Path Length Ratio	Distance hand travels to reach a target divided by straight-line distance to target.	Ratio closer to 1
	Movement Time	Time from movement initiation to termination.	Decreased time
	Initial Direction Error	Angle between line representative of straight path between targets and line corresponding to actual direction hand travels on initiation of reaching motion.	Angle closer to 0°
Object Hit	Total Hits	Number of balls successfully hit away with paddle.	Increased hits
	Miss Bias	Indication of location of misses. Negative- more misses on side of screen corresponding to affected UE and vice versa. Calculated as the mean of the distance of each missed ball from center.	Distance closer to 0
	Hit Bias	Indication of hand use. Calculated as (hits with affected − hits with unaffected)/(hits with affected + hits with unaffected).	Ratio closer to 0
	Movement Area Bias	Indication of amount of area covered by one hand relative to the other. Calculated as (area covered by affected − area covered by unaffected)/(area covered by affected + area covered by unaffected).	Ratio closer to 0