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On-line adjustment of dwell time for target selection by gaze
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Alternatives to single character entry and dwell time selection on eye typing
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i-CREATe '11 Proceedings of the 5th International Conference on Rehabilitation Engineering & Assistive Technology
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Two eye typing techniques and a fixation algorithm are described. Similar to word prediction, letter prediction chooses three highly probable next letters and highlights them on an onscreen keyboard. Letter prediction proved promising, as it was as good as word prediction, and in some cases better. The fixation algorithm chooses which button to select for eye-over highlighting. It often chooses the desired button even if another button is closer to the fixation location. Error rates were reduced when using the fixation algorithm combined with letter prediction; however, the algorithm was sensitive to the correctness of the first several letters in a word.