Learning Reward Functions from Multiple Sources of Human Feedback

Nancy J. Delong

The use of so-known as Reward features (an component of Reinforcement Learning in the discipline of machine discovering) is a widely popular method of specifying the aim of a robotic or a software package agent.

There are particular challenges linked with the structure of these features, since creating the reward perform in most conditions necessitates deep information relevant to building of mathematical designs, getting optimal methods, and creating algorithms required for their specific computation. With this in mind, researchers unanimously concur that directly discovering reward features from human lecturers is considerably far more practical strategy.

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

Impression credit rating: geralt through Pixabay (Cost-free Pixabay licence)

In this current paper, authors propose an algorithm for discovering reward features combining different sources of human feedback, which include certain guidelines (e.g. pure language), demonstrations, (e.g. kinesthetic guidance), and choices (e.g. comparative rankings).

Prior investigation has independently applied reward discovering to every single of these different data sources. However, there exist numerous domains exactly where some of these data sources are not relevant or inefficient — though a number of sources are complementary and expressive.

Motivated by this normal dilemma, we existing a framework to combine a number of sources of data, which are possibly passively or actively collected from human users. In distinct, we existing an algorithm that initial utilizes consumer demonstrations to initialize a perception about the reward perform, and then proactively probes the consumer with preference queries to zero-in on their accurate reward. This algorithm not only enables us incorporate a number of data sources, but it also informs the robotic when it should really leverage every single variety of data. Even further, our strategy accounts for the human’s potential to offer data: yielding consumer-friendly preference queries which are also theoretically optimal.

Backlink: https://arxiv.org/stomach muscles/2006.14091

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