Uncertainty in Artificial Intelligence
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A New Model of Plan Recognition
Robert Goldman, Christopher Geib, Christopher Miller
We present a new abductive, probabilistic theory of plan recognition. This model differs from previous plan recognition theories in being centered around a model of plan execution: most previous methods have been based on plans as formal objects or on rules describing the recognition process. We show that our new model accounts for phenomena omitted from most previous plan recognition theories: notably the cumulative effect of a sequence of observations of partially-ordered, interleaved plans and the effect of context on plan adoption. The model also supports inferences about the evolution of plan execution in situations where another agent intervenes in plan execution. This facility provides support for using plan recognition to build systems that will intelligently assist a user.
Keywords: plan recognition, user modeling, task tracking, intent inference, abduction
Pages: 245-254
PS Link: http://dsl.sis.pitt.edu/~uai/99/main.ps
PDF Link: /papers/99/p245-goldman.pdf
AUTHOR = "Robert Goldman and Christopher Geib and Christopher Miller",
TITLE = "A New Model of Plan Recognition",
BOOKTITLE = "Proceedings of the Fifteenth Conference Annual Conference on Uncertainty in Artificial Intelligence (UAI-99)",
PUBLISHER = "Morgan Kaufmann",
ADDRESS = "San Francisco, CA",
YEAR = "1999",
PAGES = "245--254"

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