Scalable agent alignment via reward modeling: a research direction
Paper · 2018 · Jan Leike, David Krueger, Tom Everitt et al.
Summary
Reinforcement learning thrives when a task has an explicit score, as in Atari or Go. Most practical jobs, such as handling email, writing software or managing a business, offer no built-in reward, and the user's goal exists only implicitly. The authors call this the agent alignment problem: making an agent act as its user actually wants. This DeepMind position paper presents no new data or experiments. Instead, it proposes reward modeling as a research agenda. A reward model is trained from user feedback, and a separate policy is optimized against that learned reward with RL, separating the question of what to pursue from how to pursue it. For tasks too complex for people to judge directly, the scheme can be applied recursively, with earlier trained agents helping the user evaluate the next one. The paper catalogues obstacles expected during scaling, candidate mitigations, and ways to gain confidence in the resulting agents. Its main contribution is uniting scattered AI safety problems into one coherent plan that can be tested now.
Key points
- The agenda rests on two assumptions. First, user intentions can be learned with sufficient accuracy. Second, for many tasks, judging outcomes is easier than producing the right behavior. Low-dimensional answers such as yes/no are an exception, but the assumption holds again if an explanation is required.
- Any solution should meet three desiderata:
- Scalable: it keeps working even for superhuman agents.
- Economical: it carries no cost or performance penalty compared with unaligned training.
- Pragmatic: it is a minimal viable product rather than a guarantee of perfect trust.
- The paper identifies five routes to trust: testing, interpretability, design choices, formal verification and theoretical guarantees.
- The scope is limited to one agent aligned to one user. Questions of whose preferences count, how to aggregate them, and ethics are explicitly excluded.
- The proposed empirical program hides the built-in reward of existing games and simulators. That reward is then used to generate synthetic feedback (Christiano et al., 2017) and to evaluate learned reward models (Ibarz et al., 2018). Authors: Leike, Krueger, Everitt, Martic, Maini, Legg (arXiv:1811.07871).
Fields, topics and concepts
📚 Shelves 2The field of science this work belongs to (OpenAlex fields).Computer Science · 18,614 worksArtificial Intelligence · 17,965 works
Cite
Cite as Jan Leike, David Krueger, Tom Everitt, Miljan Martic, Vishal Maini and Shane Legg. 2018. Scalable agent alignment via reward modeling: a research direction. arXiv:1811.07871.
@misc{leike2018scalable,
title = {{Scalable agent alignment via reward modeling: a research direction}},
author = {Jan Leike, David Krueger, Tom Everitt, Miljan Martic, Vishal Maini and Shane Legg},
year = {2018},
doi = {10.48550/arxiv.1811.07871},
eprint = {1811.07871},
archivePrefix = {arXiv},
url = {https://doi.org/10.48550/arxiv.1811.07871}
}References
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