Quantitative analysis of scrolling techniques

We propose a formal experimental paradigm designed to help evaluate scrolling interaction techniques. Such a method is needed by interaction designers to quantify scrolling performance, thereby providing a tool to evaluate and improve upon new techniques. We systematically vary the scrolling distance as well as the required tolerance of scrolling. Distance and tolerance are the parameters of Fitts' Law, which traditionally has been applied to the evaluation of pointing devices in tasks involving rapid, aimed movement to visible targets. Scrolling involves acquisition of targets well beyond the edges of the screen, yet Fitts' Law models our experimental data very well. We apply our paradigm to the IBM ScrollPoint and the IntelliMouse Wheel. Our experimental approach reveals a crossover effect in performance versus distance, with the Wheel performing best at short distances but the ScrollPoint performing best at long distances. We also demonstrate that the performance of the W...

• Type: Conference
• Year: 2002
• Where: CHI
• Authors: Ken Hinckley, Edward Cutrell, Steve Bathiche, Tim Muss
• Keywords: CHI 2002, Human Computer Interaction, IntelliMouse Wheel, Keywords Document Navigation, Performance Versus Distance