Amrish O. Chourasia

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OBJECTIVE The aim of this study was to investigate the effect of button size and spacing on touch characteristics (forces, impulses, and dwell times) during a digit entry touch screen task. A secondary objective was to investigate the effect of disability on touch characteristics. BACKGROUND Touch screens are common in public settings and workplaces.(More)
Touch technology is becoming more prevalent as functionality improves and cost decreases. Therefore, it is important that this technology is accessible to users with diverse abilities. The objective of this study was to investigate the effects of button and gap size on performance by individuals with varied motor abilities. Participants with (n = 38) and(More)
OBJECTIVE The aim of this study was to evaluate the effect of sitting and standing on performance and touch characteristics during a digit entry touch screen task in individuals with and without motor-control disabilities. BACKGROUND Previously, researchers of touch screen design have not considered the effect of posture (sitting vs. standing) on touch(More)
This study investigated in-vivo changes in upper limb dynamic mechanical properties and magnetic resonance imaging (MRI) parameters following short-term power hand tool operation. Previous studies have found reduction in mechanical properties following short-term power tool usage at long build-up times. This study advances that work by having participants(More)
The rise in popularity of touchscreens supports the need for improving the usability and accessibility of the technology for users with varying abilities. Touchscreen activation methods (tapping, take-off) can help address these issues but may have trade-offs (longer time to complete task). This study evaluated tapping and take-off touchscreen activation(More)
OBJECTIVE A laboratory study investigated the relationship between power hand tool and task-related factors affecting threaded fastener torque accuracy and associated handle reaction force. BACKGROUND We previously developed a biodynamic model to predict handle reaction forces. We hypothesized that torque accuracy was related to the same factors that(More)
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