Abstract
ABSTRACT In multi-touch interfaces, scrolling is a common interactive task. Scrolling performance can help users search and browse content initially off-screen. To evaluate this interaction task by performing analyses and making model assumptions about the interaction process, we divided it into two phases: the search phase and the pointing phase. As a result, quantitative modelling was developed, and two scrolling modes with and without distance feedback were considered. The results of the controlled experiments verified our four proposed mathematical hypotheses of the interaction process and indicated that our model achieved a good fit with and without distance feedback. Our work provides a theoretical foundation for modelling sophisticated scrolling actions and suggestions for user interface designs related to scrolling performance.
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