Reinforcement Teaching

• URL: http://arxiv.org/abs/2204.11897v1
• Date: Mon, 25 Apr 2022 18:04:17 GMT
• Title: Reinforcement Teaching
• Authors: Alex Lewandowski, Calarina Muslimani, Matthew E. Taylor, Jun Luo, Dale Schuurmans
• Abstract summary: We propose Reinforcement Teaching: a framework for meta-learning in which a teaching policy is learned, through reinforcement, to control a student's learning process. The student's learning process is modelled as a Markov reward process and the teacher, with its action-space, interacts with the induced Markov decision process. We show that, for many learning processes, the student's learnable parameters form a Markov state. To avoid having the teacher learn directly from parameters, we propose the Embedder that learns a representation of a student's state from its input/output behaviour.
• Score: 43.80089037901853
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose Reinforcement Teaching: a framework for meta-learning in which a teaching policy is learned, through reinforcement, to control a student's learning process. The student's learning process is modelled as a Markov reward process and the teacher, with its action-space, interacts with the induced Markov decision process. We show that, for many learning processes, the student's learnable parameters form a Markov state. To avoid having the teacher learn directly from parameters, we propose the Parameter Embedder that learns a representation of a student's state from its input/output behaviour. Next, we use learning progress to shape the teacher's reward towards maximizing the student's performance. To demonstrate the generality of Reinforcement Teaching, we conducted experiments in which a teacher learns to significantly improve supervised and reinforcement learners by using a combination of learning progress reward and a Parameter Embedded state. These results show that Reinforcement Teaching is not only an expressive framework capable of unifying different approaches, but also provides meta-learning with the plethora of tools from reinforcement learning.

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