Active Exploration for Learning Symbolic Representations
  We introduce an online active exploration algorithm for data-efficiently
learning an abstract symbolic model of an environment. Our algorithm is divided
into two parts: the first part quickly generates an intermediate Bayesian
symbolic model from the data that the agent has collected so far, which the
agent can then use along with the second part to guide its future exploration
towards regions of the state space that the model is uncertain about. We show
that our algorithm outperforms random and greedy exploration policies on two
different computer game domains. The first domain is an Asteroids-inspired game
with complex dynamics but basic logical structure. The second is the Treasure
Game, with simpler dynamics but more complex logical structure.
