ABSTRACT
Graphical-user interfaces require the use of pointing devices. While there is some research into the relative performance of these devices, there has been little consideration given to the relationship between interaction devices and task activity. In this paper it is proposed that, counter to intuitions, differences in performance with different devices are more likely to arise from the planning required to perform a task than from the operation of the device itself. It is proposed that the nature of dialogue design requires consideration of how devices support planning of activity.
