Principles of Mixed-Initiative User Interfaces

Eric Horvitz

Decision Theory & Adaptive Systems Group
Microsoft Research
Redmond, Washington 98052-6399

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Recent debate has centered on the relative promise of focusing user-interface research on developing new metaphors and tools that enhance users' abilities to directly manipulate objects versus directing effort toward developing interface agents that provide automation. In this paper, we review principles that show promise for allowing engineers to enhance human-computer interaction through an elegant coupling of automated services with direct manipulation. Key ideas will be highlighted in terms of the Lookout system for scheduling and meeting management.

Keywords: Human-computer interface, goal recognition, user modeling, intelligent agents, direct manipulation, probability, decision theory, user interface design.

In: Proceedings of CHI '99, ACM SIGCHI Conference on Human Factors in Computing Systems, Pittsburgh, PA, May 1999. ACM Press. pp 159-166.

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