no code implementations • 15 Aug 2023 • Kai Yuan, Noor Sajid, Karl Friston, Zhibin Li
We approach this problem by hierarchical generative modelling equipped with multi-level planning-for autonomous task completion-that mimics the deep temporal architecture of human motor control.
1 code implementation • 2 Jul 2023 • Aswin Paul, Noor Sajid, Lancelot Da Costa, Adeel Razi
Despite being recognized as neurobiologically plausible, active inference faces difficulties when employed to simulate intelligent behaviour in complex environments due to its computational cost and the difficulty of specifying an appropriate target distribution for the agent.
no code implementations • 19 Dec 2022 • Filip Novicky, Thomas Parr, Karl Friston, M. Berk Mirza, Noor Sajid
Bistable perception follows from observing a static, ambiguous, (visual) stimulus with two possible interpretations.
no code implementations • 25 Jul 2022 • Noor Sajid, Panagiotis Tigas, Zafeirios Fountas, Qinghai Guo, Alexey Zakharov, Lancelot Da Costa
These memories are selectively attended to, using attention and gating blocks, to update agent's preferences.
no code implementations • 21 Sep 2021 • Noor Sajid, Lancelot Da Costa, Thomas Parr, Karl Friston
Conversely, active inference reduces to Bayesian decision theory in the absence of ambiguity and relative risk, i. e., expected utility maximization.
1 code implementation • 27 Aug 2021 • Aswin Paul, Noor Sajid, Manoj Gopalkrishnan, Adeel Razi
Active inference has emerged as an alternative approach to control problems given its intuitive (probabilistic) formalism.
no code implementations • 12 Jul 2021 • Noor Sajid, Francesco Faccio, Lancelot Da Costa, Thomas Parr, Jürgen Schmidhuber, Karl Friston
Under the Bayesian brain hypothesis, behavioural variations can be attributed to different priors over generative model parameters.
no code implementations • ICML Workshop URL 2021 • Noor Sajid, Panagiotis Tigas, Alexey Zakharov, Zafeirios Fountas, Karl Friston
In this paper, we pursue the notion that this learnt behaviour can be a consequence of reward-free preference learning that ensures an appropriate trade-off between exploration and preference satisfaction.
no code implementations • 17 Sep 2020 • Lancelot Da Costa, Noor Sajid, Thomas Parr, Karl Friston, Ryan Smith
Precisely, we show the conditions under which active inference produces the optimal solution to the Bellman equation--a formulation that underlies several approaches to model-based reinforcement learning and control.
1 code implementation • NeurIPS 2020 • Zafeirios Fountas, Noor Sajid, Pedro A. M. Mediano, Karl Friston
In a more complex Animal-AI environment, our agents (using the same neural architecture) are able to simulate future state transitions and actions (i. e., plan), to evince reward-directed navigation - despite temporary suspension of visual input.
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 • 26 Nov 2018 • Yusuf H. Roohani, Noor Sajid, Pranava Madhyastha, Cathy J. Price, Thomas M. H. Hope
One third of stroke survivors have language difficulties.