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Assistive drawing devices help Cerebral Palsy children to communicate and express themselves. This case study introduces the design of a unique assistive drawing device for a Cerebral Palsy child with upper limbs disability using the USERfit framework for user-centred design. The product design includes three parts: (1) hand-grip assistive device, (2) arm(More)
This study examined how user handbreadth, brace shape and brace size of a Five-Point Grip Pen affects the performance of three screen tasks: writing, point-and-clicking, and drawing. Nine braces with three shapes (ball, ball-and-brick, and natural) and three brace sizes (large, medium and small) were tested for performance time, number of errors and(More)
Experiments were aimed at investigating the performance of various sizes of touch-pens. The touch-pens were of three different lengths (80, 110 and 140 mm) and four different diameters (5.5, 8, 11 and 15 mm). Three screen tasks were used for determining a reference of ideal dimensions of a pen-based product. Sixteen subjects used 12 touch-pens to perform(More)