How users with RSI review the usability of notebook input devices

Musculoskeletal problems are increasingly occurring and are predominately attributed to a frequent and highly repetitive use of input devices. Earlier studies [e.g. 1, 2, 3] showed that the exposure to input devices cause health risks. Even young and healthy users reported severe discomfort in finger and hand after executing cursor control tasks over 2-4 hours. For motion-impaired users also a distinct increase of discomfort was observed, but combined with longer work and rest periods compared to healthy users [4]. The present survey aims at RSI-impaired users. Three RSI-case studies were reported. Compared to healthy users RSI-impaired users were distinctly more sensitive towards exposure [cp. 3]. In can be concluded that RSI-impaired computer users limit the usefulness of notebook input devices as found for keyboard and mouse [4]. They face great barriers in terms of effort and highly rely on low demanding, low repetitive input tasks, and on adequate rest periods.