Learning Reward Functions from Multiple Sources of Human Feedback

The use of so-termed Reward features (an aspect of Reinforcement Studying in the field of device understanding) is a greatly well-known system of specifying the goal of a robot or a software agent.

There are specified problems connected with the design and style of these features, due to the fact building the reward operate in most cases demands deep understanding associated to making of mathematical models, obtaining optimal answers, and building algorithms desired for their specific computation. With this in thoughts, researchers unanimously agree that directly understanding reward features from human academics is substantially a lot more feasible method.

AI - artistic concept. Image credit: geralt via Pixabay (Free Pixabay licence)

Graphic credit: geralt through Pixabay (No cost Pixabay licence)

In this current paper, authors propose an algorithm for understanding reward features combining various resources of human feedback, which includes specific guidance (e.g. purely natural language), demonstrations, (e.g. kinesthetic guidance), and tastes (e.g. comparative rankings).

Prior research has independently utilized reward understanding to every single of these various knowledge resources. However, there exist a lot of domains the place some of these info resources are not applicable or inefficient — whilst various resources are complementary and expressive.

Enthusiastic by this typical issue, we existing a framework to combine various resources of info, which are either passively or actively gathered from human end users. In distinct, we existing an algorithm that very first makes use of person demonstrations to initialize a belief about the reward operate, and then proactively probes the person with desire queries to zero-in on their real reward. This algorithm not only allows us merge various knowledge resources, but it also informs the robot when it really should leverage every single form of info. Further, our method accounts for the human’s ability to offer knowledge: yielding person-friendly desire queries which are also theoretically optimal.

Backlink: https://arxiv.org/abs/2006.14091