Inductive Biases for Zero-shot Systematic Generalization in Language-informed Reinforcement Learning

• URL: http://arxiv.org/abs/2501.15270v1
• Date: Sat, 25 Jan 2025 16:36:59 GMT
• Title: Inductive Biases for Zero-shot Systematic Generalization in Language-informed Reinforcement Learning
• Authors: Negin Hashemi Dijujin, Seyed Roozbeh Razavi Rohani, Mohammad Mahdi Samiei, Mahdieh Soleymani Baghshah,
• Abstract summary: We provide architecture-level inductive biases for modularity and sparsity based on Neural Production Systems (NPS)<n>Our results in the BabyAI environment suggest that the proposed model's systematic generalization and sample efficiency are improved significantly compared to previous models.
• Score: 2.4392539322920763
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Sample efficiency and systematic generalization are two long-standing challenges in reinforcement learning. Previous studies have shown that involving natural language along with other observation modalities can improve generalization and sample efficiency due to its compositional and open-ended nature. However, to transfer these properties of language to the decision-making process, it is necessary to establish a proper language grounding mechanism. One approach to this problem is applying inductive biases to extract fine-grained and informative representations from the observations, which makes them more connectable to the language units. We provide architecture-level inductive biases for modularity and sparsity mainly based on Neural Production Systems (NPS). Alongside NPS, we assign a central role to memory in our architecture. It can be seen as a high-level information aggregator which feeds policy/value heads with comprehensive information and simultaneously guides selective attention in NPS through attentional feedback. Our results in the BabyAI environment suggest that the proposed model's systematic generalization and sample efficiency are improved significantly compared to previous models. An extensive ablation study on variants of the proposed method is conducted, and the effectiveness of each employed technique on generalization, sample efficiency, and training stability is specified.

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