Forward Prediction for Physical Reasoning

18 Jun 2020  ·  Rohit Girdhar, Laura Gustafson, Aaron Adcock, Laurens van der Maaten ·

Physical reasoning requires forward prediction: the ability to forecast what will happen next given some initial world state. We study the performance of state-of-the-art forward-prediction models in the complex physical-reasoning tasks of the PHYRE benchmark. We do so by incorporating models that operate on object or pixel-based representations of the world into simple physical-reasoning agents. We find that forward-prediction models can improve physical-reasoning performance, particularly on complex tasks that involve many objects. However, we also find that these improvements are contingent on the test tasks being small variations of train tasks, and that generalization to completely new task templates is challenging. Surprisingly, we observe that forward predictors with better pixel accuracy do not necessarily lead to better physical-reasoning performance.Nevertheless, our best models set a new state-of-the-art on the PHYRE benchmark.

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Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Visual Reasoning PHYRE-1B-Cross Dec[Joint]1f AUCCESS 40.3 # 2
Visual Reasoning PHYRE-1B-Within Dec[Joint]1f AUCCESS 80.0 # 3


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