Ticker: An Adaptive Single Switch Text Entry Method for Visually Impaired Users
Ticker is a probabilistic stereophonic single switch text entry method for visually impaired users with motor disabilities who rely on single switch scanning systems to communicate. Such scanning systems are sensitive to a variety of noise sources, which are inevitably introduced in practical use of single switch systems. Ticker uses a novel interaction model based on stereophonic sound coupled with statistical models for robust inference of the user's intended text in the presence of noise. As a consequence of its design, Ticker is resilient to noise and therefore a practical solution for single switch scanning systems. Ticker's performance is validated using a combination of simulations and empirical user studies.
IEEE Transactions on Pattern Analysis and Machine Intelligence