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The utilitarian brain: Moving beyond the Free Energy Principle.

Babak Hemmatian1, Lav R Varshney2, Frederick Pi3

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Summary

The Free Energy Principle (FEP) struggles to explain decision-making due to its lack of subjective preference (utility). Current FEP models are insufficient for unifying brain science, suggesting a need for context-specific applications.

Keywords:
Bayesian Brain HypothesisCognitive neuroscienceDecision-makingExtended cognitionFree Energy PrincipleSubjective utility

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Area of Science:

  • Computational Neuroscience
  • Cognitive Science
  • Theoretical Neuroscience

Background:

  • The Free Energy Principle (FEP) is a proposed unifying theory for brain function, aiming to explain perception and action via prediction error minimization.
  • Decision-making is a critical cognitive function that any unifying brain theory must adequately explain without irreducible concepts.

Purpose of the Study:

  • To evaluate the capacity of Free Energy Principle (FEP) based models to account for decision-making mechanisms.
  • To identify limitations of FEP in explaining behavior in various decision-making tasks.

Main Methods:

  • Analysis of existing FEP-based decision-making models against established meta-theoretical constraints.
  • Evaluation of FEP's explanatory power in diagnostic, predictive, and multi-armed bandit tasks.

Main Results:

  • Reductive FEP models for decision-making fail to adequately explain behavior in key experimental tasks.
  • Shortcomings are traced to FEP's inadequate conceptualization of subjective preference or 'utility'.
  • Attempts to fully reduce utility to FEP require unrealistic assumptions.

Conclusions:

  • The Free Energy Principle, in its current form, is unlikely to serve as a unifying theory of brain science due to its limitations in explaining decision-making.
  • Future research should focus on identifying contexts where informational or reward constraints are primary, defining FEP's scope.
  • A proposed two-factor framework can compare informational versus reward constraint contributions to behavior.