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Poster
in
Workshop: LaReL: Language and Reinforcement Learning

Overcoming Referential Ambiguity in language-guided goal-conditioned Reinforcement Learning

Hugo Caselles-Dupré · Olivier Sigaud · Mohamed CHETOUANI

Keywords: [ pragmatism ] [ language-guided reinforcement learning ] [ rational speech acts ] [ goal-conditioned reinforcement learning ]


Abstract:

Teaching an agent to perform new tasks using natural language can easily be hindered by ambiguities in interpretation. When a teacher provides an instruction to a learner about an object by referring to its features, the learner can misunderstand the teacher's intentions, for instance if the instruction ambiguously refer to features of the object, a phenomenon called referential ambiguity. We study how two concepts derived from cognitive sciences can help resolve those referential ambiguities: pedagogy (selecting the right instructions) and pragmatism (learning the preferences of the other agents using inductive reasoning). We apply those ideas to a teacher/learner setup with two artificial agents on a simulated robotic task (block-stacking). We show that these concepts improve sample efficiency for training the learner.

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