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Eye tracking for interactive accessibility: a usability analysis of communication interfaces

Arslan, Kaan Sergen
At the late stages of ALS, i.e., Amyotrophic Lateral Sclerosis, individuals may lose their ability to speak, eat, move, and even breathe without ventilator support. Alternative modalities of communication, such as gaze, may have a potential to provide a communication interface that may increase the quality of life in cases as such. This study aims at developing interactive interfaces for gaze-based communication, and it reports a small-scale usability analysis for a comparison of the interfaces. In particular, we focus on two dimensions in the experimental investigation: The interface layout design and gaze recording interfaces. The interface layouts include a virtual QWERTY keyboard, an alphabetical one, as well as a cascades menu. The gaze recording interfaces include a wearable eye tracker and a webcam-based eye tracker. More generally, we focus on the role of the simplicity of the interface, the functionality of it, and the usability, which may be three contradicting aspects of interface design and development.