Position control devices enable precise selection, but significant clutching degrades performance. Clutching can be reduced with high control-display gain or pointer acceleration, but there are human and device limits. Elastic rate control eliminates clutching completely, but can make precise selection difficult. We show that hybrid positionrate control can outperform position control by 20% when there is significant clutching, even when using pointer acceleration. Unlike previous work, our RubberEdge technique eliminates trajectory and velocity discontinuities. We derive predictive models for position control with clutching and hybrid control, and present a prototype RubberEdge position-rate control device including initial user feedback.
A user study was conducted for a 2D pointing task and results showed that RubberEdge outperformed position control by 20% when there was significant clutching REF .
RubberEdge: Reducing Clutching by Combining Position and Rate Control with Elastic Feedback
Dans Proceedings of the 20th annual ACM symposium on User interface software and technology - Symposium on User Interface Software and Technology, Lille : France (2007)
Computer Science