no code implementations • 6 Dec 2023 • Karl J. Friston, Tommaso Salvatori, Takuya Isomura, Alexander Tschantz, Alex Kiefer, Tim Verbelen, Magnus Koudahl, Aswin Paul, Thomas Parr, Adeel Razi, Brett Kagan, Christopher L. Buckley, Maxwell J. D. Ramstead
First, we simulate the aforementioned in vitro experiments, in which neuronal cultures spontaneously learn to play Pong, by implementing nested, free energy minimising processes.
no code implementations • 17 Nov 2023 • Karl J. Friston, Lancelot Da Costa, Alexander Tschantz, Alex Kiefer, Tommaso Salvatori, Victorita Neacsu, Magnus Koudahl, Conor Heins, Noor Sajid, Dimitrije Markovic, Thomas Parr, Tim Verbelen, Christopher L Buckley
This paper concerns structure learning or discovery of discrete generative models.
1 code implementation • 21 Sep 2023 • Dimitrije Marković, Karl J. Friston, Stefan J. Kiebel
Bayesian sparsification for deep learning emerges as a crucial approach, facilitating the design of models that are both computationally efficient and competitive in terms of performance across various deep learning applications.
no code implementations • 12 Sep 2023 • Sungwoo Lee, Younghyun Oh, Hyunhoe An, Hyebhin Yoon, Karl J. Friston, Seok Jun Hong, Choong-Wan Woo
Building autonomous --- i. e., choosing goals based on one's needs -- and adaptive -- i. e., surviving in ever-changing environments -- agents has been a holy grail of artificial intelligence (AI).
no code implementations • 21 Aug 2023 • Johan Medrano, Karl J. Friston, Peter Zeidman
A pervasive challenge in neuroscience is testing whether neuronal connectivity changes over time due to specific causes, such as stimuli, events, or clinical interventions.
no code implementations • 3 Jan 2023 • Gerald K. Cooray, Richard E. Rosch, Karl J. Friston
However, in contrast to previous work, we derive coupled equations between phase and amplitude dynamics.
no code implementations • 7 Apr 2022 • Achim Schilling, William Sedley, Richard Gerum, Claus Metzner, Konstantin Tziridis, Andreas Maier, Holger Schulze, Fan-Gang Zeng, Karl J. Friston, Patrick Krauss
How is information processed in the brain during perception?
no code implementations • 21 Feb 2022 • Katharina Wegner, Charles R. E. Wilson, Emmanuel Procyk, Karl J. Friston, Frederik Van de Steen, Dimitris A. Pinotsis, Daniele Marinazzo
We apply Dynamic Causal Models to electrocorticogram recordings from two macaque monkeys performing a problem-solving task that engages working memory, and induces time-on-task effects.
no code implementations • 22 Apr 2021 • Felix Schoeller, Mark Miller, Roy Salomon, Karl J. Friston
This model is based on the cognitive neuroscience of active inference and suggests that, in the context of HRC, trust can be cast in terms of virtual control over an artificial agent.
no code implementations • 9 Apr 2020 • Karl J. Friston, Thomas Parr, Peter Zeidman, Adeel Razi, Guillaume Flandin, Jean Daunizeau, Oliver J. Hulme, Alexander J. Billig, Vladimir Litvak, Rosalyn J. Moran, Cathy J. Price, Christian Lambert
This technical report describes a dynamic causal model of the spread of coronavirus through a population.
1 code implementation • 24 Sep 2019 • Noor Sajid, Philip J. Ball, Thomas Parr, Karl J. Friston
In this paper, we provide: 1) an accessible overview of the discrete-state formulation of active inference, highlighting natural behaviors in active inference that are generally engineered in RL; 2) an explicit discrete-state comparison between active inference and RL on an OpenAI gym baseline.
no code implementations • 18 Mar 2019 • Amirhossein Jafarian, Vladimir Litvak, Hayriye Cagnan, Karl J. Friston, Peter Zeidman
The ensuing estimates of neuronal parameters are used to generate neuronal drive functions, which model the pre or post synaptic responses to each experimental condition in the fMRI paradigm.
Quantitative Methods
no code implementations • 30 Apr 2018 • Biswa Sengupta, Karl J. Friston
In this paper, we evaluate the robustness of three recurrent neural networks to tiny perturbations, on three widely used datasets, to argue that high accuracy does not always mean a stable and a robust (to bounded perturbations, adversarial attacks, etc.)
no code implementations • NeuroImage 2014 • Adeel Razi, Joshua Kahan, Geraint Rees, Karl J. Friston
We also simulated group differences and compared the ability of spectral and stochastic DCMs to identify these differences.