Search Results for author: Anil Seth

Found 9 papers, 4 papers with code

Minimum-phase property of the hemodynamic response function, and implications for Granger Causality in fMRI

no code implementations4 Dec 2023 Leonardo Novelli, Lionel Barnett, Anil Seth, Adeel Razi

We find that these models are minimum-phase for a wide range of physiologically plausible parameter values.

A continuity of Markov blanket interpretations under the Free Energy Principle

no code implementations18 Jan 2022 Anil Seth, Tomasz Korbak, Alexander Tschantz

Bruineberg and colleagues helpfully distinguish between instrumental and ontological interpretations of Markov blankets, exposing the dangers of using the former to make claims about the latter.

A Mathematical Walkthrough and Discussion of the Free Energy Principle

no code implementations30 Aug 2021 Beren Millidge, Anil Seth, Christopher L Buckley

The Free-Energy-Principle (FEP) is an influential and controversial theory which postulates a deep and powerful connection between the stochastic thermodynamics of self-organization and learning through variational inference.

Bayesian Inference Philosophy +1

Predictive Coding: a Theoretical and Experimental Review

no code implementations27 Jul 2021 Beren Millidge, Anil Seth, Christopher L Buckley

Predictive coding offers a potentially unifying account of cortical function -- postulating that the core function of the brain is to minimize prediction errors with respect to a generative model of the world.

Understanding the Origin of Information-Seeking Exploration in Probabilistic Objectives for Control

1 code implementation11 Mar 2021 Beren Millidge, Anil Seth, Christopher Buckley

We propose a dichotomy in the objective functions underlying adaptive behaviour between \emph{evidence} objectives, which correspond to well-known reward or utility maximizing objectives in the literature, and \emph{divergence} objectives which instead seek to minimize the divergence between the agent's expected and desired futures, and argue that this new class of divergence objectives could form the mathematical foundation for a much richer understanding of the exploratory components of adaptive and intelligent action, beyond simply greedy utility maximization.

BIG-bench Machine Learning

Neural Kalman Filtering

1 code implementation19 Feb 2021 Beren Millidge, Alexander Tschantz, Anil Seth, Christopher Buckley

The Kalman filter is a fundamental filtering algorithm that fuses noisy sensory data, a previous state estimate, and a dynamics model to produce a principled estimate of the current state.

The APOGEE Library of Infrared SSP Templates (A-LIST): High-Resolution Simple Stellar Population Spectral Models in the H-Band

1 code implementation31 Dec 2020 Aishwarya Ashok, Gail Zasowski, Anil Seth, Sten Hasselquist, Galen Bergsten, Olivia Cooper, Nicholas Boardman, Dmitry Bizyaev, Sofia Meneses Goytia, D. A. García-Hernández, Alexandre Roman-Lopes

This set of SSP templates is the highest resolution ($R\sim22500$) available in the near infrared, and the first such based on an empirical stellar library.

Astrophysics of Galaxies Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics

Investigating the Scalability and Biological Plausibility of the Activation Relaxation Algorithm

1 code implementation13 Oct 2020 Beren Millidge, Alexander Tschantz, Anil Seth, Christopher L Buckley

The recently proposed Activation Relaxation (AR) algorithm provides a simple and robust approach for approximating the backpropagation of error algorithm using only local learning rules.

Relaxing the Constraints on Predictive Coding Models

no code implementations2 Oct 2020 Beren Millidge, Alexander Tschantz, Anil Seth, Christopher L Buckley

Predictive coding is an influential theory of cortical function which posits that the principal computation the brain performs, which underlies both perception and learning, is the minimization of prediction errors.

Variational Inference

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