Speed-accuracy trade-off in dwell-based eye pointing tasks at different cognitive levels

In this paper, we present a target searching experiment to investigate how long is long enough to maintain the speed-accuracy trade-off in eye pointing tasks that use dwell time as the activation mechanism. The experimental task, which took account of three factors including cognitive complexity, dwell time and visual feedback mode, mixes visual search and target acquisition together. In other words, the subjects need to search for and recognize the target before the final selection in each trial. The results clarify the suitable ranges of dwell time for users to avoid wrong selections as possible as they can under different cognitive load conditions. We also discussed the implications for user interface designs.