Title
Acquisition of expanding targets
Abstract
There exist several user interface widgets that dynamically grow in size in response to the user's focus of attention. Some of these, such as icons in toolbars, expand to facilitate their selection - allowing for a reduced initial size in an attempt to optimize screen space use. However, selection performance may be degraded by this decreased initial widget size. We describe an experiment which explores the effects of varying parameters of expansion techniques in a selection task. Our results suggest that Fitts' law can model and predict performance in such tasks. They also indicate that performance is governed by the target's final size, not its initial one. Further, performance is dependent on the target's final size even when the target only begins expanding as late as after 90% of the movement towards the target has already been completed. These results indicate that expanding widgets can be used without sacrificing performance
Year
DOI
Venue
2002
10.1145/503376.503388
CHI
Keywords
Field
DocType
interaction design,initial widget size,reduced initial size,interaction modeling,empirical evaluation,selection performance,screen space use,expanding targets,final size,fitts' law,expansion technique,user interface widget,selection task,varying parameter,user interface,fitts law
Fitts's law,Interaction design,Simulation,Computer science,Human–computer interaction,User interface,Screen space
Conference
ISBN
Citations 
PageRank 
1-58113-453-3
112
9.09
References 
Authors
4
2
Search Limit
100112
Name
Order
Citations
PageRank
Michael J. McGuffin198954.52
Ravin Balakrishnan26497403.55