Intrinsic Motivation via Surprise Memory

Hung Le, Kien Do, Dung Nguyen, Svetha Venkatesh

Keywords: reinforcement learning, intrinsic motivation, exploration, memory

TL;DR: Intrinsic motivation emerges through measuring surprise novelty as retrieval errors of a memory network

Abstract: We present a new computing model for intrinsic rewards in reinforcement learning that addresses the limitations of existing surprise-driven explorations. The reward is the novelty of the surprise rather than the surprise norm. We estimate the surprise novelty as retrieval errors of a memory network wherein the memory stores and reconstructs surprises. Our surprise memory (SM) augments the capability of surprise-based intrinsic motivators, maintaining the agent's interest in exciting exploration while reducing unwanted attraction to unpredictable or noisy observations. Our experiments demonstrate that the SM combined with various surprise predictors exhibits efficient exploring behaviors and significantly boosts the final performance in sparse reward environments, including Noisy-TV, navigation and challenging Atari games.

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