Satisficing Models of Bayesian Theory of Mind to Explain the Behavior of Differently Uncertain Agents
2018
The Bayesian Theory of Mind (ToM) framework has become a common
approach to model reasoning about other agents’ desires and
beliefs based on their actions. Such models can get very complex
when being used to explain the behavior of agents with different
uncertainties, giving rise to the question if simpler models can also
be satisficing, i.e. sufficing and satisfying, in different uncertainty
conditions. In this paper we present a method to simplify inference
in complex ToM models by switching between discrete assumptions
about certain belief states (corresponding to different ToM models)
based on the resulting surprisal. We report on a study to evaluate a
complex full model, simplified versions, and a switching model on
human behavioral data in a navigation task under specific uncertainties.
Results show that the switching model achieves inference
results better than the full Bayesian ToM model but with higher
efficiency, providing a basis for attaining the ability for "satisficing
mentalizing" in social agents.
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