Search Results for author: Stuart Russell

Found 50 papers, 19 papers with code

An Empirical Investigation of Representation Learning for Imitation

2 code implementations16 May 2022 Xin Chen, Sam Toyer, Cody Wild, Scott Emmons, Ian Fischer, Kuang-Huei Lee, Neel Alex, Steven H Wang, Ping Luo, Stuart Russell, Pieter Abbeel, Rohin Shah

We propose a modular framework for constructing representation learning algorithms, then use our framework to evaluate the utility of representation learning for imitation across several environment suites.

Image Classification Imitation Learning +1

Estimating and Penalizing Induced Preference Shifts in Recommender Systems

no code implementations25 Apr 2022 Micah Carroll, Dylan Hadfield-Menell, Stuart Russell, Anca Dragan

In simulated experiments, we show that our learned preference dynamics model is effective in estimating user preferences and how they would respond to new recommenders.

Recommendation Systems

Invariance in Policy Optimisation and Partial Identifiability in Reward Learning

no code implementations14 Mar 2022 Joar Skalse, Matthew Farrugia-Roberts, Stuart Russell, Alessandro Abate, Adam Gleave

By contrast, we formally characterise the partial identifiability of popular data sources, including demonstrations and trajectory preferences, under multiple common sets of assumptions.

Quantifying Local Specialization in Deep Neural Networks

3 code implementations13 Oct 2021 Shlomi Hod, Daniel Filan, Stephen Casper, Andrew Critch, Stuart Russell

These results suggest that graph-based partitioning can reveal local specialization and that statistical methods can be used to automatedly screen for sets of neurons that can be understood abstractly.

Cross-Domain Imitation Learning via Optimal Transport

no code implementations ICLR 2022 Arnaud Fickinger, samuel cohen, Stuart Russell, Brandon Amos

Cross-domain imitation learning studies how to leverage expert demonstrations of one agent to train an imitation agent with a different embodiment or morphology.

Continuous Control Imitation Learning

Scalable Online Planning via Reinforcement Learning Fine-Tuning

1 code implementation NeurIPS 2021 Arnaud Fickinger, Hengyuan Hu, Brandon Amos, Stuart Russell, Noam Brown

Lookahead search has been a critical component of recent AI successes, such as in the games of chess, go, and poker.


Detecting Modularity in Deep Neural Networks

no code implementations29 Sep 2021 Shlomi Hod, Stephen Casper, Daniel Filan, Cody Wild, Andrew Critch, Stuart Russell

These results suggest that graph-based partitioning can reveal modularity and help us understand how deep neural networks function.

The MineRL BASALT Competition on Learning from Human Feedback

no code implementations5 Jul 2021 Rohin Shah, Cody Wild, Steven H. Wang, Neel Alex, Brandon Houghton, William Guss, Sharada Mohanty, Anssi Kanervisto, Stephanie Milani, Nicholay Topin, Pieter Abbeel, Stuart Russell, Anca Dragan

Rather than training AI systems using a predefined reward function or using a labeled dataset with a predefined set of categories, we instead train the AI system using a learning signal derived from some form of human feedback, which can evolve over time as the understanding of the task changes, or as the capabilities of the AI system improve.

Imitation Learning

Uncertain Decisions Facilitate Better Preference Learning

no code implementations NeurIPS 2021 Cassidy Laidlaw, Stuart Russell

We give the first statistical analysis of IDT, providing conditions necessary to identify these preferences and characterizing the sample complexity -- the number of decisions that must be observed to learn the tradeoff the human is making to a desired precision.

MADE: Exploration via Maximizing Deviation from Explored Regions

1 code implementation NeurIPS 2021 Tianjun Zhang, Paria Rashidinejad, Jiantao Jiao, Yuandong Tian, Joseph Gonzalez, Stuart Russell

As a proof of concept, we evaluate the new intrinsic reward on tabular examples across a variety of model-based and model-free algorithms, showing improvements over count-only exploration strategies.

Efficient Exploration

Bridging Offline Reinforcement Learning and Imitation Learning: A Tale of Pessimism

no code implementations NeurIPS 2021 Paria Rashidinejad, Banghua Zhu, Cong Ma, Jiantao Jiao, Stuart Russell

Based on the composition of the offline dataset, two main categories of methods are used: imitation learning which is suitable for expert datasets and vanilla offline RL which often requires uniform coverage datasets.

Imitation Learning Multi-Armed Bandits +2

Clusterability in Neural Networks

2 code implementations4 Mar 2021 Daniel Filan, Stephen Casper, Shlomi Hod, Cody Wild, Andrew Critch, Stuart Russell

We also exhibit novel methods to promote clusterability in neural network training, and find that in multi-layer perceptrons they lead to more clusterable networks with little reduction in accuracy.

Accumulating Risk Capital Through Investing in Cooperation

no code implementations25 Jan 2021 Charlotte Roman, Michael Dennis, Andrew Critch, Stuart Russell

Recent work on promoting cooperation in multi-agent learning has resulted in many methods which successfully promote cooperation at the cost of becoming more vulnerable to exploitation by malicious actors.

Discrete Predictive Representation for Long-horizon Planning

no code implementations1 Jan 2021 Thanard Kurutach, Julia Peng, Yang Gao, Stuart Russell, Pieter Abbeel

Discrete representations have been key in enabling robots to plan at more abstract levels and solve temporally-extended tasks more efficiently for decades.


Benefits of Assistance over Reward Learning

no code implementations1 Jan 2021 Rohin Shah, Pedro Freire, Neel Alex, Rachel Freedman, Dmitrii Krasheninnikov, Lawrence Chan, Michael D Dennis, Pieter Abbeel, Anca Dragan, Stuart Russell

By merging reward learning and control, assistive agents can reason about the impact of control actions on reward learning, leading to several advantages over agents based on reward learning.

Importance and Coherence: Methods for Evaluating Modularity in Neural Networks

no code implementations1 Jan 2021 Shlomi Hod, Stephen Casper, Daniel Filan, Cody Wild, Andrew Critch, Stuart Russell

We apply these methods on partitionings generated by a spectral clustering algorithm which uses a graph representation of the network's neurons and weights.

Multi-Principal Assistance Games: Definition and Collegial Mechanisms

no code implementations29 Dec 2020 Arnaud Fickinger, Simon Zhuang, Andrew Critch, Dylan Hadfield-Menell, Stuart Russell

We introduce the concept of a multi-principal assistance game (MPAG), and circumvent an obstacle in social choice theory, Gibbard's theorem, by using a sufficiently collegial preference inference mechanism.

Understanding Learned Reward Functions

1 code implementation10 Dec 2020 Eric J. Michaud, Adam Gleave, Stuart Russell

However, current techniques for reward learning may fail to produce reward functions which accurately reflect user preferences.

DERAIL: Diagnostic Environments for Reward And Imitation Learning

2 code implementations2 Dec 2020 Pedro Freire, Adam Gleave, Sam Toyer, Stuart Russell

We evaluate a range of common reward and imitation learning algorithms on our tasks.

Imitation Learning

The MAGICAL Benchmark for Robust Imitation

1 code implementation NeurIPS 2020 Sam Toyer, Rohin Shah, Andrew Critch, Stuart Russell

This rewards precise reproduction of demonstrations in one particular environment, but provides little information about how robustly an algorithm can generalise the demonstrator's intent to substantially different deployment settings.

Imitation Learning

SLIP: Learning to Predict in Unknown Dynamical Systems with Long-Term Memory

1 code implementation NeurIPS 2020 Paria Rashidinejad, Jiantao Jiao, Stuart Russell

Our theoretical and experimental results shed light on the conditions required for efficient probably approximately correct (PAC) learning of the Kalman filter from partially observed data.

Multi-Principal Assistance Games

no code implementations19 Jul 2020 Arnaud Fickinger, Simon Zhuang, Dylan Hadfield-Menell, Stuart Russell

Assistance games (also known as cooperative inverse reinforcement learning games) have been proposed as a model for beneficial AI, wherein a robotic agent must act on behalf of a human principal but is initially uncertain about the humans payoff function.

Quantifying Differences in Reward Functions

1 code implementation ICLR 2021 Adam Gleave, Michael Dennis, Shane Legg, Stuart Russell, Jan Leike

However, this method cannot distinguish between the learned reward function failing to reflect user preferences and the policy optimization process failing to optimize the learned reward.

Pruned Neural Networks are Surprisingly Modular

2 code implementations10 Mar 2020 Daniel Filan, Shlomi Hod, Cody Wild, Andrew Critch, Stuart Russell

To discern structure in these weights, we introduce a measurable notion of modularity for multi-layer perceptrons (MLPs), and investigate the modular structure of MLPs trained on datasets of small images.

Graph Clustering

Bayesian Relational Memory for Semantic Visual Navigation

1 code implementation ICCV 2019 Yi Wu, Yuxin Wu, Aviv Tamar, Stuart Russell, Georgia Gkioxari, Yuandong Tian

We introduce a new memory architecture, Bayesian Relational Memory (BRM), to improve the generalization ability for semantic visual navigation agents in unseen environments, where an agent is given a semantic target to navigate towards.

Visual Navigation

Adversarial Policies: Attacking Deep Reinforcement Learning

1 code implementation ICLR 2020 Adam Gleave, Michael Dennis, Cody Wild, Neel Kant, Sergey Levine, Stuart Russell

Deep reinforcement learning (RL) policies are known to be vulnerable to adversarial perturbations to their observations, similar to adversarial examples for classifiers.


Inverse reinforcement learning for video games

1 code implementation24 Oct 2018 Aaron Tucker, Adam Gleave, Stuart Russell

Deep reinforcement learning achieves superhuman performance in a range of video game environments, but requires that a designer manually specify a reward function.

Continuous Control reinforcement-learning

Learning and Planning with a Semantic Model

no code implementations ICLR 2019 Yi Wu, Yuxin Wu, Aviv Tamar, Stuart Russell, Georgia Gkioxari, Yuandong Tian

Building deep reinforcement learning agents that can generalize and adapt to unseen environments remains a fundamental challenge for AI.

reinforcement-learning Visual Navigation

Learning Plannable Representations with Causal InfoGAN

1 code implementation NeurIPS 2018 Thanard Kurutach, Aviv Tamar, Ge Yang, Stuart Russell, Pieter Abbeel

Finally, to generate a visual plan, we project the current and goal observations onto their respective states in the planning model, plan a trajectory, and then use the generative model to transform the trajectory to a sequence of observations.

Representation Learning

An Efficient, Generalized Bellman Update For Cooperative Inverse Reinforcement Learning

no code implementations ICML 2018 Dhruv Malik, Malayandi Palaniappan, Jaime F. Fisac, Dylan Hadfield-Menell, Stuart Russell, Anca D. Dragan

We apply this update to a variety of POMDP solvers and find that it enables us to scale CIRL to non-trivial problems, with larger reward parameter spaces, and larger action spaces for both robot and human.


Discrete-Continuous Mixtures in Probabilistic Programming: Generalized Semantics and Inference Algorithms

no code implementations ICML 2018 Yi Wu, Siddharth Srivastava, Nicholas Hay, Simon Du, Stuart Russell

Despite the recent successes of probabilistic programming languages (PPLs) in AI applications, PPLs offer only limited support for random variables whose distributions combine discrete and continuous elements.

Probabilistic Programming

Inverse Reward Design

no code implementations NeurIPS 2017 Dylan Hadfield-Menell, Smitha Milli, Pieter Abbeel, Stuart Russell, Anca Dragan

When designing the reward, we might think of some specific training scenarios, and make sure that the reward will lead to the right behavior in those scenarios.

Servant of Many Masters: Shifting priorities in Pareto-optimal sequential decision-making

no code implementations31 Oct 2017 Andrew Critch, Stuart Russell

It is often argued that an agent making decisions on behalf of two or more principals who have different utility functions should adopt a {\em Pareto-optimal} policy, i. e., a policy that cannot be improved upon for one agent without making sacrifices for another.

Decision Making

Adversarial Training for Relation Extraction

no code implementations EMNLP 2017 Yi Wu, David Bamman, Stuart Russell

Adversarial training is a mean of regularizing classification algorithms by generating adversarial noise to the training data.

General Classification Image Classification +3

Should Robots be Obedient?

1 code implementation28 May 2017 Smitha Milli, Dylan Hadfield-Menell, Anca Dragan, Stuart Russell

We show that when a human is not perfectly rational then a robot that tries to infer and act according to the human's underlying preferences can always perform better than a robot that simply follows the human's literal order.

The Off-Switch Game

no code implementations24 Nov 2016 Dylan Hadfield-Menell, Anca Dragan, Pieter Abbeel, Stuart Russell

We analyze a simple game between a human H and a robot R, where H can press R's off switch but R can disable the off switch.

Cooperative Inverse Reinforcement Learning

2 code implementations NeurIPS 2016 Dylan Hadfield-Menell, Anca Dragan, Pieter Abbeel, Stuart Russell

For an autonomous system to be helpful to humans and to pose no unwarranted risks, it needs to align its values with those of the humans in its environment in such a way that its actions contribute to the maximization of value for the humans.

Active Learning reinforcement-learning

Towards Practical Bayesian Parameter and State Estimation

no code implementations29 Mar 2016 Yusuf Bugra Erol, Yi Wu, Lei LI, Stuart Russell

Joint state and parameter estimation is a core problem for dynamic Bayesian networks.

Research Priorities for Robust and Beneficial Artificial Intelligence

no code implementations10 Feb 2016 Stuart Russell, Daniel Dewey, Max Tegmark

Success in the quest for artificial intelligence has the potential to bring unprecedented benefits to humanity, and it is therefore worthwhile to investigate how to maximize these benefits while avoiding potential pitfalls.

Probabilistic Model-Based Approach for Heart Beat Detection

no code implementations24 Dec 2015 Hugh Chen, Yusuf Erol, Eric Shen, Stuart Russell

One of the biggest flaws in the medical system is perhaps an unexpected one: the patient alarm system.

Bayesian Inference

Selecting Computations: Theory and Applications

no code implementations9 Aug 2014 Nicholas Hay, Stuart Russell, David Tolpin, Solomon Eyal Shimony

Sequential decision problems are often approximately solvable by simulating possible future action sequences.

Game of Go

Automated Construction of Sparse Bayesian Networks from Unstructured Probabilistic Models and Domain Information

no code implementations27 Mar 2013 Sampath Srinivas, Stuart Russell, Alice M. Agogino

An algorithm for automated construction of a sparse Bayesian network given an unstructured probabilistic model and causal domain information from an expert has been developed and implemented.

Fine-Grained Decision-Theoretic Search Control

no code implementations27 Mar 2013 Stuart Russell

This formula is used to estimate the value of expanding further successors, using a general formula for the value of a computation in game-playing developed in earlier work.

Variational MCMC

no code implementations10 Jan 2013 Nando de Freitas, Pedro Hojen-Sorensen, Michael. I. Jordan, Stuart Russell

One of these algorithms is a mixture of two MCMC kernels: a random walk Metropolis kernel and a blockMetropolis-Hastings (MH) kernel with a variational approximation as proposaldistribution.

Markov Chain Monte Carlo Data Association for Multiple-Target Tracking

no code implementations IEEE Transactions on Automatic Control 2009 Songhwai Oh, Stuart Russell, Shankar Sastry

This paper presents Markov chain Monte Carlo data association (MCMCDA) for solving data association problems arising in multiple-target tracking in a cluttered environment.

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