Abstract
This paper presents a user study comparing two methods for keyboard-driven mouse replacement: CKM, an active Conventional Keyboard Mouse, and DualMouse, an innovative keyboard technique allowing stepwise, recursive target acquisition. Both strategies are implemented in the pointing component of OnScreenDualScribe, a comprehensive assistive software system that turns a compact keypad into a universal input device. The study involves eight non-disabled participants and a single user with Friedreich Ataxia. The results reveal that CKM yields about 60 % higher throughput that DualMouse. However, the DualMouse technique is preferable for certain specific tasks. Our intention with this research is to gain new insights into OnScreenDualScribe and to inspire future developers of mouse-replacement interfaces for persons with physical disabilities.
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