a simple movement time model for scrolling
A model for movement time for scrolling is developed and verified experimentally. It is hypothesized that the maximum scroll speed is a constant at which the target can be perceived when scrolling over the screen. In an experiment where distance to target and target width were varied, it was found that movement time did not follow Fitts' law. Rather, it was linearly dependent on the distance to the target, suggesting a constant maximum scrolling speed. We hypothesize that the same relationship between movement time and target distance apply to other computer interaction tasks where the position of the target is not known ahead of time, and the data in which the target is sought is not ordered.
movement time model movement timing model scrolling experience distance fitts' law dependencies relationships computation interaction posit data