AN ALGORITHM FOR ADJUSTABLE DWELL TIME IN EYE TYPING SYSTEMS

Abstract

In eye typing systems, a dwell time that adjusts to the user’s natural typing speed is highly desirable. We present an algorithm for adjustable dwell time developed after detailed analysis of exit time upon selection of virtual keys. Exit time was measured using a wide range of dwell times for selection (300-1100 ms). The results suggest that there was a considerable variability in exit time among the users indicating the need for calibration of the algorithm. The algorithm was evaluated in a user study and proved to be efficient. We also discuss the shortcomings of the current algorithm’s implementation.