Fig. 1

Study setup (A); The algorithm divides the tested surface into 3 zones: the proximal target zone (100 mm from the center of the proximal target (i.e., the origin) on the y axis); the distal target zone (100 mm from the center of the distal target on the y axis) and the between target zone. The blue and red dots represent touches included in the analysis of the proximal and distal target respectively. The yellow dots represent touches that were between the targets. For example, in the proximal target all 9 touches were identified as ‘in-target’ whereas in the distal target 5 touches were considered as ‘in-target’ and 3 were considered as ‘outside-target’. Three touches were identified as ‘between-targets’ (B)