Different tablet and stylus design features were evaluated for usability and biomechanical properties. On the basis of short-term tasks, emulating functional tablets, usability was improved with the smaller and medium-sized tablets, portrait (vs. landscape) orientation, a back ledge grip and rubberised texture. There were no differences in productivity between design features.
Tablets computers are being rapidly adopted in commercial and home settings. However, there are no guidelines on design features of tablets to optimize usability. The purpose of this study was to evaluate tablet size, weight, orientation, grip shape, texture, and stylus shape on productivity, usability, and biomechanics when the tablet is held with just the left hand. Thirty subjects tested eight tablets and three styluses. Overall, the usability, fatigue and biomechanical evaluation of tablet design features supported the use of smaller to medium sized tablets, with a ledge or handle shape on the back and surfaced with a rubberized texture. Larger tablets had significantly worse usability and biomechanics. The stylus with a tapered grip (7.5-9.5 mm) or larger grip (7.6 mm) had better usability and biomechanics than one with a smaller grip (5 mm). These design parameters may be important when designing tablets that will be held with one hand.
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