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Summary

EFE-GLean enhances active inference by integrating epistemic value for improved information-seeking behavior. This model enables agents to achieve goals by exploiting hidden information and adapting to environmental changes.

Keywords:
active inferencecuriosity-driven explorationfree-energy principlegoal-directed action planninginformation gain

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Area of Science:

  • Cognitive Science
  • Computational Neuroscience
  • Artificial Intelligence

Background:

  • Active inference provides a unified framework for goal-directed and epistemic behaviors.
  • Implementing policy search in high-dimensional continuous action spaces poses scalability and stability challenges.
  • Previous T-GLean model enabled efficient goal-directed planning but lacked epistemic value for information-seeking.

Purpose of the Study:

  • To present EFE-GLean, an extension of T-GLean, integrating epistemic value into planning.
  • To enable agents to engage in information-seeking behavior critical for achieving preferred outcomes.
  • To demonstrate enhanced goal-directed policies through low-dimensional trajectory inference and information gain maximization.

Main Methods:

  • Developed EFE-GLean by integrating an epistemic term into the expected free energy minimization process.
  • Utilized simulation experiments on an extended T-maze task in discrete and continuous domains.
  • Employed simultaneous minimization of past variational free energy and future expected free energy for adaptive planning.

Main Results:

  • EFE-GLean agents successfully achieved goals by exploiting hidden environmental information.
  • The model demonstrated the ability to adapt to abrupt environmental changes by dynamically revising plans.
  • Simulation experiments confirmed the agent's capacity for both goal-directed and information-seeking behaviors.

Conclusions:

  • EFE-GLean effectively integrates epistemic value into active inference for enhanced agent behavior.
  • The model offers a scalable and stable approach for policy search in complex environments.
  • EFE-GLean provides insights into the mechanisms underlying adaptive goal-directed and epistemic actions.