Hi-Phy: A Benchmark for Hierarchical Physical Reasoning

• URL: http://arxiv.org/abs/2106.09692v1
• Date: Thu, 17 Jun 2021 17:46:50 GMT
• Title: Hi-Phy: A Benchmark for Hierarchical Physical Reasoning
• Authors: Cheng Xue, Vimukthini Pinto, Chathura Gamage, Peng Zhang and Jochen Renz
• Abstract summary: Reasoning about the behaviour of physical objects is a key capability of agents operating in physical worlds. We propose a new benchmark for physical reasoning that allows us to test individual physical reasoning capabilities. Our benchmark tests capabilities according to this hierarchy through generated physical reasoning tasks in the video game Angry Birds.
• Score: 5.854222601444695
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Reasoning about the behaviour of physical objects is a key capability of agents operating in physical worlds. Humans are very experienced in physical reasoning while it remains a major challenge for AI. To facilitate research addressing this problem, several benchmarks have been proposed recently. However, these benchmarks do not enable us to measure an agent's granular physical reasoning capabilities when solving a complex reasoning task. In this paper, we propose a new benchmark for physical reasoning that allows us to test individual physical reasoning capabilities. Inspired by how humans acquire these capabilities, we propose a general hierarchy of physical reasoning capabilities with increasing complexity. Our benchmark tests capabilities according to this hierarchy through generated physical reasoning tasks in the video game Angry Birds. This benchmark enables us to conduct a comprehensive agent evaluation by measuring the agent's granular physical reasoning capabilities. We conduct an evaluation with human players, learning agents, and heuristic agents and determine their capabilities. Our evaluation shows that learning agents, with good local generalization ability, still struggle to learn the underlying physical reasoning capabilities and perform worse than current state-of-the-art heuristic agents and humans. We believe that this benchmark will encourage researchers to develop intelligent agents with advanced, human-like physical reasoning capabilities. URL: https://github.com/Cheng-Xue/Hi-Phy

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