An Experimental Analysis of
Undo in Ubiquitous Computing
Environments
Marco Loregian, Marco P. Locatelli
University of Milano-Bicocca (Italy)

Outline
• Problem
• Experiment
• Results
• Ongoing and future work
• Conclusion

Undo
• Well known function of PC applications
• Allows to revert (the effects of) commands
• Applied to user actions
• Different strategies

What does “undo”
mean in ubicomp
environments?

The problem
• We need to know it in order to design
usable (successful) systems
• How should we find it out?
• Undo is a user intention
• We surveyed potential users

The experiment
• Introduction of the problem with a video-
scenario
• Multi-part survey