Search Results for author: Christopher Summerfield

Found 12 papers, 1 papers with code

Are task representations gated in macaque prefrontal cortex?

no code implementations29 Jun 2023 Timo Flesch, Valerio Mante, William Newsome, Andrew Saxe, Christopher Summerfield, David Sussillo

A recent paper (Flesch et al, 2022) describes behavioural and neural data suggesting that task representations are gated in the prefrontal cortex in both humans and macaques.

Abrupt and spontaneous strategy switches emerge in simple regularised neural networks

no code implementations22 Feb 2023 Anika T. Löwe, Léo Touzo, Paul S. Muhle-Karbe, Andrew M. Saxe, Christopher Summerfield, Nicolas W. Schuck

Humans sometimes have an insight that leads to a sudden and drastic performance improvement on the task they are working on.

Beyond Bayes-optimality: meta-learning what you know you don't know

no code implementations30 Sep 2022 Jordi Grau-Moya, Grégoire Delétang, Markus Kunesch, Tim Genewein, Elliot Catt, Kevin Li, Anian Ruoss, Chris Cundy, Joel Veness, Jane Wang, Marcus Hutter, Christopher Summerfield, Shane Legg, Pedro Ortega

This is in contrast to risk-sensitive agents, which additionally exploit the higher-order moments of the return, and ambiguity-sensitive agents, which act differently when recognizing situations in which they lack knowledge.

Decision Making Meta-Learning

Modelling continual learning in humans with Hebbian context gating and exponentially decaying task signals

1 code implementation22 Mar 2022 Timo Flesch, David G. Nagy, Andrew Saxe, Christopher Summerfield

Here, we propose novel computational constraints for artificial neural networks, inspired by earlier work on gating in the primate prefrontal cortex, that capture the cost of interleaved training and allow the network to learn two tasks in sequence without forgetting.

Continual Learning

The Good Shepherd: An Oracle Agent for Mechanism Design

no code implementations21 Feb 2022 Jan Balaguer, Raphael Koster, Christopher Summerfield, Andrea Tacchetti

Our results show that our mechanisms are able to shepherd the participants strategies towards favorable outcomes, indicating a path for modern institutions to effectively and automatically influence the strategies and behaviors of their constituents.

HCMD-zero: Learning Value Aligned Mechanisms from Data

no code implementations21 Feb 2022 Jan Balaguer, Raphael Koster, Ari Weinstein, Lucy Campbell-Gillingham, Christopher Summerfield, Matthew Botvinick, Andrea Tacchetti

Our analysis shows HCMD-zero consistently makes the mechanism policy more and more likely to be preferred by human participants over the course of training, and that it results in a mechanism with an interpretable and intuitive policy.

Characterizing emergent representations in a space of candidate learning rules for deep networks

no code implementations NeurIPS 2020 Yinan Cao, Christopher Summerfield, Andrew Saxe

Studies suggesting that representations in deep networks resemble those in biological brains have mostly relied on one specific learning rule: gradient descent, the workhorse behind modern deep learning.

If deep learning is the answer, then what is the question?

no code implementations16 Apr 2020 Andrew Saxe, Stephanie Nelli, Christopher Summerfield

In this Perspective, our goal is to offer a roadmap for systems neuroscience research in the age of deep learning.

Neurons and Cognition

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