Policy Similarity Metric
Policy Similarity Metric
**Policy Similarity Metric**, or **PSM**, is a similarity metric for measuring behavioral similarity between states in reinforcement learning. It assigns high similarity to states for which the optimal policies in those states as well as in future states are similar. PSM is reward-agnostic, making it more robust for generalization compared to approaches that rely on reward information.
Contrastive Behavioral Similarity Embeddings for Generalization in Reinforcement Learning
https://paperswithcode.com/paper/contrastive-behavioral-similarity-embeddings-1
Contrastive Behavioral Similarity Embeddings for Generalization in Reinforcement Learning