Skill Preferences: Learning to Extract and Execute Robotic Skills from Human FeedbackDownload PDF

19 Jun 2021, 10:04 (edited 04 Nov 2021)CoRL2021 PosterReaders: Everyone
  • Keywords: Reinforcement Learning, Skill Extraction, Human Preferences
  • Abstract: A promising approach to solving challenging long-horizon tasks has been to extract behavior priors (skills) by fitting generative models to large offline datasets of demonstrations. However, such generative models inherit the biases of the underlying data and result in poor and unusable skills when trained on imperfect demonstration data. To better align skill extraction with human intent we present Skill Preferences (SkiP), an algorithm that learns a model over human preferences and uses it to extract human-aligned skills from offline data. After extracting human-preferred skills, SkiP also utilizes human feedback to solve downstream tasks with RL. We show that SkiP enables a simulated kitchen robot to solve complex multi-step manipulation tasks and substantially outperforms prior leading RL algorithms with human preferences as well as leading skill extraction algorithms without human preferences.
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